Actual source code: dm.c
1: #include <petscvec.h>
2: #include <petsc/private/dmimpl.h>
3: #include <petsc/private/dmlabelimpl.h>
4: #include <petsc/private/petscdsimpl.h>
5: #include <petscdmplex.h>
6: #include <petscdmceed.h>
7: #include <petscdmfield.h>
8: #include <petscsf.h>
9: #include <petscds.h>
11: #ifdef PETSC_HAVE_LIBCEED
12: #include <petscfeceed.h>
13: #endif
15: PetscClassId DM_CLASSID;
16: PetscClassId DMLABEL_CLASSID;
17: PetscLogEvent DM_Convert, DM_GlobalToLocal, DM_LocalToGlobal, DM_LocalToLocal, DM_LocatePoints, DM_Coarsen, DM_Refine, DM_CreateInterpolation, DM_CreateRestriction, DM_CreateInjection, DM_CreateMatrix, DM_CreateMassMatrix, DM_Load, DM_View, DM_AdaptInterpolator, DM_ProjectFunction;
19: const char *const DMBoundaryTypes[] = {"NONE", "GHOSTED", "MIRROR", "PERIODIC", "TWIST", "DMBoundaryType", "DM_BOUNDARY_", NULL};
20: const char *const DMBoundaryConditionTypes[] = {"INVALID", "ESSENTIAL", "NATURAL", "INVALID", "INVALID", "ESSENTIAL_FIELD", "NATURAL_FIELD", "INVALID", "INVALID", "ESSENTIAL_BD_FIELD", "NATURAL_RIEMANN", "DMBoundaryConditionType", "DM_BC_", NULL};
21: const char *const DMBlockingTypes[] = {"TOPOLOGICAL_POINT", "FIELD_NODE", "DMBlockingType", "DM_BLOCKING_", NULL};
22: const char *const DMPolytopeTypes[] =
23: {"vertex", "segment", "tensor_segment", "triangle", "quadrilateral", "tensor_quad", "tetrahedron", "hexahedron", "triangular_prism", "tensor_triangular_prism", "tensor_quadrilateral_prism", "pyramid", "FV_ghost_cell", "interior_ghost_cell",
24: "unknown", "unknown_cell", "unknown_face", "invalid", "DMPolytopeType", "DM_POLYTOPE_", NULL};
25: const char *const DMCopyLabelsModes[] = {"replace", "keep", "fail", "DMCopyLabelsMode", "DM_COPY_LABELS_", NULL};
27: /*@
28: DMCreate - Creates an empty `DM` object. `DM`s are the abstract objects in PETSc that mediate between meshes and discretizations and the
29: algebraic solvers, time integrators, and optimization algorithms.
31: Collective
33: Input Parameter:
34: . comm - The communicator for the `DM` object
36: Output Parameter:
37: . dm - The `DM` object
39: Level: beginner
41: Notes:
42: See `DMType` for a brief summary of available `DM`.
44: The type must then be set with `DMSetType()`. If you never call `DMSetType()` it will generate an
45: error when you try to use the dm.
47: .seealso: [](ch_dmbase), `DM`, `DMSetType()`, `DMType`, `DMDACreate()`, `DMDA`, `DMSLICED`, `DMCOMPOSITE`, `DMPLEX`, `DMMOAB`, `DMNETWORK`
48: @*/
49: PetscErrorCode DMCreate(MPI_Comm comm, DM *dm)
50: {
51: DM v;
52: PetscDS ds;
54: PetscFunctionBegin;
55: PetscAssertPointer(dm, 2);
57: PetscCall(DMInitializePackage());
58: PetscCall(PetscHeaderCreate(v, DM_CLASSID, "DM", "Distribution Manager", "DM", comm, DMDestroy, DMView));
59: ((PetscObject)v)->non_cyclic_references = &DMCountNonCyclicReferences;
60: v->setupcalled = PETSC_FALSE;
61: v->setfromoptionscalled = PETSC_FALSE;
62: v->ltogmap = NULL;
63: v->bind_below = 0;
64: v->bs = 1;
65: v->coloringtype = IS_COLORING_GLOBAL;
66: PetscCall(PetscSFCreate(comm, &v->sf));
67: PetscCall(PetscSFCreate(comm, &v->sectionSF));
68: v->labels = NULL;
69: v->adjacency[0] = PETSC_FALSE;
70: v->adjacency[1] = PETSC_TRUE;
71: v->depthLabel = NULL;
72: v->celltypeLabel = NULL;
73: v->localSection = NULL;
74: v->globalSection = NULL;
75: v->defaultConstraint.section = NULL;
76: v->defaultConstraint.mat = NULL;
77: v->defaultConstraint.bias = NULL;
78: v->coordinates[0].dim = PETSC_DEFAULT;
79: v->coordinates[1].dim = PETSC_DEFAULT;
80: v->sparseLocalize = PETSC_TRUE;
81: v->dim = PETSC_DETERMINE;
82: {
83: PetscInt i;
84: for (i = 0; i < 10; ++i) {
85: v->nullspaceConstructors[i] = NULL;
86: v->nearnullspaceConstructors[i] = NULL;
87: }
88: }
89: PetscCall(PetscDSCreate(PETSC_COMM_SELF, &ds));
90: PetscCall(DMSetRegionDS(v, NULL, NULL, ds, NULL));
91: PetscCall(PetscDSDestroy(&ds));
92: PetscCall(PetscHMapAuxCreate(&v->auxData));
93: v->dmBC = NULL;
94: v->coarseMesh = NULL;
95: v->outputSequenceNum = -1;
96: v->outputSequenceVal = 0.0;
97: PetscCall(DMSetVecType(v, VECSTANDARD));
98: PetscCall(DMSetMatType(v, MATAIJ));
100: *dm = v;
101: PetscFunctionReturn(PETSC_SUCCESS);
102: }
104: /*@
105: DMClone - Creates a `DM` object with the same topology as the original.
107: Collective
109: Input Parameter:
110: . dm - The original `DM` object
112: Output Parameter:
113: . newdm - The new `DM` object
115: Level: beginner
117: Notes:
118: For some `DM` implementations this is a shallow clone, the result of which may share (reference counted) information with its parent. For example,
119: `DMClone()` applied to a `DMPLEX` object will result in a new `DMPLEX` that shares the topology with the original `DMPLEX`. It does not
120: share the `PetscSection` of the original `DM`.
122: The clone is considered set up if the original has been set up.
124: Use `DMConvert()` for a general way to create new `DM` from a given `DM`
126: .seealso: [](ch_dmbase), `DM`, `DMDestroy()`, `DMCreate()`, `DMSetType()`, `DMSetLocalSection()`, `DMSetGlobalSection()`, `DMPLEX`, `DMConvert()`
127: @*/
128: PetscErrorCode DMClone(DM dm, DM *newdm)
129: {
130: PetscSF sf;
131: Vec coords;
132: void *ctx;
133: MatOrderingType otype;
134: DMReorderDefaultFlag flg;
135: PetscInt dim, cdim, i;
137: PetscFunctionBegin;
139: PetscAssertPointer(newdm, 2);
140: PetscCall(DMCreate(PetscObjectComm((PetscObject)dm), newdm));
141: PetscCall(DMCopyLabels(dm, *newdm, PETSC_COPY_VALUES, PETSC_TRUE, DM_COPY_LABELS_FAIL));
142: (*newdm)->leveldown = dm->leveldown;
143: (*newdm)->levelup = dm->levelup;
144: (*newdm)->prealloc_only = dm->prealloc_only;
145: (*newdm)->prealloc_skip = dm->prealloc_skip;
146: PetscCall(PetscFree((*newdm)->vectype));
147: PetscCall(PetscStrallocpy(dm->vectype, (char **)&(*newdm)->vectype));
148: PetscCall(PetscFree((*newdm)->mattype));
149: PetscCall(PetscStrallocpy(dm->mattype, (char **)&(*newdm)->mattype));
150: PetscCall(DMGetDimension(dm, &dim));
151: PetscCall(DMSetDimension(*newdm, dim));
152: PetscTryTypeMethod(dm, clone, newdm);
153: (*newdm)->setupcalled = dm->setupcalled;
154: PetscCall(DMGetPointSF(dm, &sf));
155: PetscCall(DMSetPointSF(*newdm, sf));
156: PetscCall(DMGetApplicationContext(dm, &ctx));
157: PetscCall(DMSetApplicationContext(*newdm, ctx));
158: PetscCall(DMReorderSectionGetDefault(dm, &flg));
159: PetscCall(DMReorderSectionSetDefault(*newdm, flg));
160: PetscCall(DMReorderSectionGetType(dm, &otype));
161: PetscCall(DMReorderSectionSetType(*newdm, otype));
162: for (i = 0; i < 2; ++i) {
163: if (dm->coordinates[i].dm) {
164: DM ncdm;
165: PetscSection cs;
166: PetscInt pEnd = -1, pEndMax = -1;
168: PetscCall(DMGetLocalSection(dm->coordinates[i].dm, &cs));
169: if (cs) PetscCall(PetscSectionGetChart(cs, NULL, &pEnd));
170: PetscCallMPI(MPIU_Allreduce(&pEnd, &pEndMax, 1, MPIU_INT, MPI_MAX, PetscObjectComm((PetscObject)dm)));
171: if (pEndMax >= 0) {
172: PetscCall(DMClone(dm->coordinates[i].dm, &ncdm));
173: PetscCall(DMCopyDisc(dm->coordinates[i].dm, ncdm));
174: PetscCall(DMSetLocalSection(ncdm, cs));
175: if (dm->coordinates[i].dm->periodic.setup) {
176: ncdm->periodic.setup = dm->coordinates[i].dm->periodic.setup;
177: PetscCall(ncdm->periodic.setup(ncdm));
178: }
179: if (i) PetscCall(DMSetCellCoordinateDM(*newdm, ncdm));
180: else PetscCall(DMSetCoordinateDM(*newdm, ncdm));
181: PetscCall(DMDestroy(&ncdm));
182: }
183: }
184: }
185: PetscCall(DMGetCoordinateDim(dm, &cdim));
186: PetscCall(DMSetCoordinateDim(*newdm, cdim));
187: PetscCall(DMGetCoordinatesLocal(dm, &coords));
188: if (coords) {
189: PetscCall(DMSetCoordinatesLocal(*newdm, coords));
190: } else {
191: PetscCall(DMGetCoordinates(dm, &coords));
192: if (coords) PetscCall(DMSetCoordinates(*newdm, coords));
193: }
194: PetscCall(DMGetCellCoordinatesLocal(dm, &coords));
195: if (coords) {
196: PetscCall(DMSetCellCoordinatesLocal(*newdm, coords));
197: } else {
198: PetscCall(DMGetCellCoordinates(dm, &coords));
199: if (coords) PetscCall(DMSetCellCoordinates(*newdm, coords));
200: }
201: {
202: const PetscReal *maxCell, *Lstart, *L;
204: PetscCall(DMGetPeriodicity(dm, &maxCell, &Lstart, &L));
205: PetscCall(DMSetPeriodicity(*newdm, maxCell, Lstart, L));
206: }
207: {
208: PetscBool useCone, useClosure;
210: PetscCall(DMGetAdjacency(dm, PETSC_DEFAULT, &useCone, &useClosure));
211: PetscCall(DMSetAdjacency(*newdm, PETSC_DEFAULT, useCone, useClosure));
212: }
213: PetscFunctionReturn(PETSC_SUCCESS);
214: }
216: /*@
217: DMSetVecType - Sets the type of vector to be created with `DMCreateLocalVector()` and `DMCreateGlobalVector()`
219: Logically Collective
221: Input Parameters:
222: + dm - initial distributed array
223: - ctype - the vector type, for example `VECSTANDARD`, `VECCUDA`, or `VECVIENNACL`
225: Options Database Key:
226: . -dm_vec_type ctype - the type of vector to create
228: Level: intermediate
230: .seealso: [](ch_dmbase), `DM`, `DMCreate()`, `DMDestroy()`, `DMDAInterpolationType`, `VecType`, `DMGetVecType()`, `DMSetMatType()`, `DMGetMatType()`,
231: `VECSTANDARD`, `VECCUDA`, `VECVIENNACL`, `DMCreateLocalVector()`, `DMCreateGlobalVector()`
232: @*/
233: PetscErrorCode DMSetVecType(DM dm, VecType ctype)
234: {
235: char *tmp;
237: PetscFunctionBegin;
239: PetscAssertPointer(ctype, 2);
240: tmp = (char *)dm->vectype;
241: PetscCall(PetscStrallocpy(ctype, (char **)&dm->vectype));
242: PetscCall(PetscFree(tmp));
243: PetscFunctionReturn(PETSC_SUCCESS);
244: }
246: /*@
247: DMGetVecType - Gets the type of vector created with `DMCreateLocalVector()` and `DMCreateGlobalVector()`
249: Logically Collective
251: Input Parameter:
252: . da - initial distributed array
254: Output Parameter:
255: . ctype - the vector type
257: Level: intermediate
259: .seealso: [](ch_dmbase), `DM`, `DMCreate()`, `DMDestroy()`, `DMDAInterpolationType`, `VecType`, `DMSetMatType()`, `DMGetMatType()`, `DMSetVecType()`
260: @*/
261: PetscErrorCode DMGetVecType(DM da, VecType *ctype)
262: {
263: PetscFunctionBegin;
265: *ctype = da->vectype;
266: PetscFunctionReturn(PETSC_SUCCESS);
267: }
269: /*@
270: VecGetDM - Gets the `DM` defining the data layout of the vector
272: Not Collective
274: Input Parameter:
275: . v - The `Vec`
277: Output Parameter:
278: . dm - The `DM`
280: Level: intermediate
282: Note:
283: A `Vec` may not have a `DM` associated with it.
285: .seealso: [](ch_dmbase), `DM`, `VecSetDM()`, `DMGetLocalVector()`, `DMGetGlobalVector()`, `DMSetVecType()`
286: @*/
287: PetscErrorCode VecGetDM(Vec v, DM *dm)
288: {
289: PetscFunctionBegin;
291: PetscAssertPointer(dm, 2);
292: PetscCall(PetscObjectQuery((PetscObject)v, "__PETSc_dm", (PetscObject *)dm));
293: PetscFunctionReturn(PETSC_SUCCESS);
294: }
296: /*@
297: VecSetDM - Sets the `DM` defining the data layout of the vector.
299: Not Collective
301: Input Parameters:
302: + v - The `Vec`
303: - dm - The `DM`
305: Level: developer
307: Notes:
308: This is rarely used, generally one uses `DMGetLocalVector()` or `DMGetGlobalVector()` to create a vector associated with a given `DM`
310: This is NOT the same as `DMCreateGlobalVector()` since it does not change the view methods or perform other customization, but merely sets the `DM` member.
312: .seealso: [](ch_dmbase), `DM`, `VecGetDM()`, `DMGetLocalVector()`, `DMGetGlobalVector()`, `DMSetVecType()`
313: @*/
314: PetscErrorCode VecSetDM(Vec v, DM dm)
315: {
316: PetscFunctionBegin;
319: PetscCall(PetscObjectCompose((PetscObject)v, "__PETSc_dm", (PetscObject)dm));
320: PetscFunctionReturn(PETSC_SUCCESS);
321: }
323: /*@
324: DMSetISColoringType - Sets the type of coloring, `IS_COLORING_GLOBAL` or `IS_COLORING_LOCAL` that is created by the `DM`
326: Logically Collective
328: Input Parameters:
329: + dm - the `DM` context
330: - ctype - the matrix type
332: Options Database Key:
333: . -dm_is_coloring_type - global or local
335: Level: intermediate
337: .seealso: [](ch_dmbase), `DM`, `DMDACreate1d()`, `DMDACreate2d()`, `DMDACreate3d()`, `DMCreateMatrix()`, `DMCreateMassMatrix()`, `DMSetMatrixPreallocateOnly()`, `MatType`, `DMGetMatType()`,
338: `DMGetISColoringType()`, `ISColoringType`, `IS_COLORING_GLOBAL`, `IS_COLORING_LOCAL`
339: @*/
340: PetscErrorCode DMSetISColoringType(DM dm, ISColoringType ctype)
341: {
342: PetscFunctionBegin;
344: dm->coloringtype = ctype;
345: PetscFunctionReturn(PETSC_SUCCESS);
346: }
348: /*@
349: DMGetISColoringType - Gets the type of coloring, `IS_COLORING_GLOBAL` or `IS_COLORING_LOCAL` that is created by the `DM`
351: Logically Collective
353: Input Parameter:
354: . dm - the `DM` context
356: Output Parameter:
357: . ctype - the matrix type
359: Options Database Key:
360: . -dm_is_coloring_type - global or local
362: Level: intermediate
364: .seealso: [](ch_dmbase), `DM`, `DMDACreate1d()`, `DMDACreate2d()`, `DMDACreate3d()`, `DMCreateMatrix()`, `DMCreateMassMatrix()`, `DMSetMatrixPreallocateOnly()`, `MatType`, `DMGetMatType()`,
365: `ISColoringType`, `IS_COLORING_GLOBAL`, `IS_COLORING_LOCAL`
366: @*/
367: PetscErrorCode DMGetISColoringType(DM dm, ISColoringType *ctype)
368: {
369: PetscFunctionBegin;
371: *ctype = dm->coloringtype;
372: PetscFunctionReturn(PETSC_SUCCESS);
373: }
375: /*@
376: DMSetMatType - Sets the type of matrix created with `DMCreateMatrix()`
378: Logically Collective
380: Input Parameters:
381: + dm - the `DM` context
382: - ctype - the matrix type, for example `MATMPIAIJ`
384: Options Database Key:
385: . -dm_mat_type ctype - the type of the matrix to create, for example mpiaij
387: Level: intermediate
389: .seealso: [](ch_dmbase), `DM`, `MatType`, `DMDACreate1d()`, `DMDACreate2d()`, `DMDACreate3d()`, `DMCreateMatrix()`, `DMCreateMassMatrix()`, `DMSetMatrixPreallocateOnly()`, `DMGetMatType()`, `DMCreateGlobalVector()`, `DMCreateLocalVector()`
390: @*/
391: PetscErrorCode DMSetMatType(DM dm, MatType ctype)
392: {
393: char *tmp;
395: PetscFunctionBegin;
397: PetscAssertPointer(ctype, 2);
398: tmp = (char *)dm->mattype;
399: PetscCall(PetscStrallocpy(ctype, (char **)&dm->mattype));
400: PetscCall(PetscFree(tmp));
401: PetscFunctionReturn(PETSC_SUCCESS);
402: }
404: /*@
405: DMGetMatType - Gets the type of matrix that would be created with `DMCreateMatrix()`
407: Logically Collective
409: Input Parameter:
410: . dm - the `DM` context
412: Output Parameter:
413: . ctype - the matrix type
415: Level: intermediate
417: .seealso: [](ch_dmbase), `DM`, `DMDACreate1d()`, `DMDACreate2d()`, `DMDACreate3d()`, `DMCreateMatrix()`, `DMCreateMassMatrix()`, `DMSetMatrixPreallocateOnly()`, `MatType`, `DMSetMatType()`
418: @*/
419: PetscErrorCode DMGetMatType(DM dm, MatType *ctype)
420: {
421: PetscFunctionBegin;
423: *ctype = dm->mattype;
424: PetscFunctionReturn(PETSC_SUCCESS);
425: }
427: /*@
428: MatGetDM - Gets the `DM` defining the data layout of the matrix
430: Not Collective
432: Input Parameter:
433: . A - The `Mat`
435: Output Parameter:
436: . dm - The `DM`
438: Level: intermediate
440: Note:
441: A matrix may not have a `DM` associated with it
443: Developer Note:
444: Since the `Mat` class doesn't know about the `DM` class the `DM` object is associated with the `Mat` through a `PetscObjectCompose()` operation
446: .seealso: [](ch_dmbase), `DM`, `MatSetDM()`, `DMCreateMatrix()`, `DMSetMatType()`
447: @*/
448: PetscErrorCode MatGetDM(Mat A, DM *dm)
449: {
450: PetscFunctionBegin;
452: PetscAssertPointer(dm, 2);
453: PetscCall(PetscObjectQuery((PetscObject)A, "__PETSc_dm", (PetscObject *)dm));
454: PetscFunctionReturn(PETSC_SUCCESS);
455: }
457: /*@
458: MatSetDM - Sets the `DM` defining the data layout of the matrix
460: Not Collective
462: Input Parameters:
463: + A - The `Mat`
464: - dm - The `DM`
466: Level: developer
468: Note:
469: This is rarely used in practice, rather `DMCreateMatrix()` is used to create a matrix associated with a particular `DM`
471: Developer Note:
472: Since the `Mat` class doesn't know about the `DM` class the `DM` object is associated with
473: the `Mat` through a `PetscObjectCompose()` operation
475: .seealso: [](ch_dmbase), `DM`, `MatGetDM()`, `DMCreateMatrix()`, `DMSetMatType()`
476: @*/
477: PetscErrorCode MatSetDM(Mat A, DM dm)
478: {
479: PetscFunctionBegin;
482: PetscCall(PetscObjectCompose((PetscObject)A, "__PETSc_dm", (PetscObject)dm));
483: PetscFunctionReturn(PETSC_SUCCESS);
484: }
486: /*@
487: DMSetOptionsPrefix - Sets the prefix prepended to all option names when searching through the options database
489: Logically Collective
491: Input Parameters:
492: + dm - the `DM` context
493: - prefix - the prefix to prepend
495: Level: advanced
497: Note:
498: A hyphen (-) must NOT be given at the beginning of the prefix name.
499: The first character of all runtime options is AUTOMATICALLY the hyphen.
501: .seealso: [](ch_dmbase), `DM`, `PetscObjectSetOptionsPrefix()`, `DMSetFromOptions()`
502: @*/
503: PetscErrorCode DMSetOptionsPrefix(DM dm, const char prefix[])
504: {
505: PetscFunctionBegin;
507: PetscCall(PetscObjectSetOptionsPrefix((PetscObject)dm, prefix));
508: if (dm->sf) PetscCall(PetscObjectSetOptionsPrefix((PetscObject)dm->sf, prefix));
509: if (dm->sectionSF) PetscCall(PetscObjectSetOptionsPrefix((PetscObject)dm->sectionSF, prefix));
510: PetscFunctionReturn(PETSC_SUCCESS);
511: }
513: /*@
514: DMAppendOptionsPrefix - Appends an additional string to an already existing prefix used for searching for
515: `DM` options in the options database.
517: Logically Collective
519: Input Parameters:
520: + dm - the `DM` context
521: - prefix - the string to append to the current prefix
523: Level: advanced
525: Note:
526: If the `DM` does not currently have an options prefix then this value is used alone as the prefix as if `DMSetOptionsPrefix()` had been called.
527: A hyphen (-) must NOT be given at the beginning of the prefix name.
528: The first character of all runtime options is AUTOMATICALLY the hyphen.
530: .seealso: [](ch_dmbase), `DM`, `DMSetOptionsPrefix()`, `DMGetOptionsPrefix()`, `PetscObjectAppendOptionsPrefix()`, `DMSetFromOptions()`
531: @*/
532: PetscErrorCode DMAppendOptionsPrefix(DM dm, const char prefix[])
533: {
534: PetscFunctionBegin;
536: PetscCall(PetscObjectAppendOptionsPrefix((PetscObject)dm, prefix));
537: PetscFunctionReturn(PETSC_SUCCESS);
538: }
540: /*@
541: DMGetOptionsPrefix - Gets the prefix used for searching for all
542: DM options in the options database.
544: Not Collective
546: Input Parameter:
547: . dm - the `DM` context
549: Output Parameter:
550: . prefix - pointer to the prefix string used is returned
552: Level: advanced
554: Fortran Note:
555: Pass in a string 'prefix' of
556: sufficient length to hold the prefix.
558: .seealso: [](ch_dmbase), `DM`, `DMSetOptionsPrefix()`, `DMAppendOptionsPrefix()`, `DMSetFromOptions()`
559: @*/
560: PetscErrorCode DMGetOptionsPrefix(DM dm, const char *prefix[])
561: {
562: PetscFunctionBegin;
564: PetscCall(PetscObjectGetOptionsPrefix((PetscObject)dm, prefix));
565: PetscFunctionReturn(PETSC_SUCCESS);
566: }
568: static PetscErrorCode DMCountNonCyclicReferences_Internal(DM dm, PetscBool recurseCoarse, PetscBool recurseFine, PetscInt *ncrefct)
569: {
570: PetscInt refct = ((PetscObject)dm)->refct;
572: PetscFunctionBegin;
573: *ncrefct = 0;
574: if (dm->coarseMesh && dm->coarseMesh->fineMesh == dm) {
575: refct--;
576: if (recurseCoarse) {
577: PetscInt coarseCount;
579: PetscCall(DMCountNonCyclicReferences_Internal(dm->coarseMesh, PETSC_TRUE, PETSC_FALSE, &coarseCount));
580: refct += coarseCount;
581: }
582: }
583: if (dm->fineMesh && dm->fineMesh->coarseMesh == dm) {
584: refct--;
585: if (recurseFine) {
586: PetscInt fineCount;
588: PetscCall(DMCountNonCyclicReferences_Internal(dm->fineMesh, PETSC_FALSE, PETSC_TRUE, &fineCount));
589: refct += fineCount;
590: }
591: }
592: *ncrefct = refct;
593: PetscFunctionReturn(PETSC_SUCCESS);
594: }
596: /* Generic wrapper for DMCountNonCyclicReferences_Internal() */
597: PetscErrorCode DMCountNonCyclicReferences(PetscObject dm, PetscInt *ncrefct)
598: {
599: PetscFunctionBegin;
600: PetscCall(DMCountNonCyclicReferences_Internal((DM)dm, PETSC_TRUE, PETSC_TRUE, ncrefct));
601: PetscFunctionReturn(PETSC_SUCCESS);
602: }
604: PetscErrorCode DMDestroyLabelLinkList_Internal(DM dm)
605: {
606: DMLabelLink next = dm->labels;
608: PetscFunctionBegin;
609: /* destroy the labels */
610: while (next) {
611: DMLabelLink tmp = next->next;
613: if (next->label == dm->depthLabel) dm->depthLabel = NULL;
614: if (next->label == dm->celltypeLabel) dm->celltypeLabel = NULL;
615: PetscCall(DMLabelDestroy(&next->label));
616: PetscCall(PetscFree(next));
617: next = tmp;
618: }
619: dm->labels = NULL;
620: PetscFunctionReturn(PETSC_SUCCESS);
621: }
623: static PetscErrorCode DMDestroyCoordinates_Private(DMCoordinates *c)
624: {
625: PetscFunctionBegin;
626: c->dim = PETSC_DEFAULT;
627: PetscCall(DMDestroy(&c->dm));
628: PetscCall(VecDestroy(&c->x));
629: PetscCall(VecDestroy(&c->xl));
630: PetscCall(DMFieldDestroy(&c->field));
631: PetscFunctionReturn(PETSC_SUCCESS);
632: }
634: /*@
635: DMDestroy - Destroys a `DM`.
637: Collective
639: Input Parameter:
640: . dm - the `DM` object to destroy
642: Level: developer
644: .seealso: [](ch_dmbase), `DM`, `DMCreate()`, `DMType`, `DMSetType()`, `DMView()`, `DMCreateGlobalVector()`, `DMCreateInterpolation()`, `DMCreateColoring()`, `DMCreateMatrix()`
645: @*/
646: PetscErrorCode DMDestroy(DM *dm)
647: {
648: PetscInt cnt;
650: PetscFunctionBegin;
651: if (!*dm) PetscFunctionReturn(PETSC_SUCCESS);
654: /* count all non-cyclic references in the doubly-linked list of coarse<->fine meshes */
655: PetscCall(DMCountNonCyclicReferences_Internal(*dm, PETSC_TRUE, PETSC_TRUE, &cnt));
656: --((PetscObject)*dm)->refct;
657: if (--cnt > 0) {
658: *dm = NULL;
659: PetscFunctionReturn(PETSC_SUCCESS);
660: }
661: if (((PetscObject)*dm)->refct < 0) PetscFunctionReturn(PETSC_SUCCESS);
662: ((PetscObject)*dm)->refct = 0;
664: PetscCall(DMClearGlobalVectors(*dm));
665: PetscCall(DMClearLocalVectors(*dm));
666: PetscCall(DMClearNamedGlobalVectors(*dm));
667: PetscCall(DMClearNamedLocalVectors(*dm));
669: /* Destroy the list of hooks */
670: {
671: DMCoarsenHookLink link, next;
672: for (link = (*dm)->coarsenhook; link; link = next) {
673: next = link->next;
674: PetscCall(PetscFree(link));
675: }
676: (*dm)->coarsenhook = NULL;
677: }
678: {
679: DMRefineHookLink link, next;
680: for (link = (*dm)->refinehook; link; link = next) {
681: next = link->next;
682: PetscCall(PetscFree(link));
683: }
684: (*dm)->refinehook = NULL;
685: }
686: {
687: DMSubDomainHookLink link, next;
688: for (link = (*dm)->subdomainhook; link; link = next) {
689: next = link->next;
690: PetscCall(PetscFree(link));
691: }
692: (*dm)->subdomainhook = NULL;
693: }
694: {
695: DMGlobalToLocalHookLink link, next;
696: for (link = (*dm)->gtolhook; link; link = next) {
697: next = link->next;
698: PetscCall(PetscFree(link));
699: }
700: (*dm)->gtolhook = NULL;
701: }
702: {
703: DMLocalToGlobalHookLink link, next;
704: for (link = (*dm)->ltoghook; link; link = next) {
705: next = link->next;
706: PetscCall(PetscFree(link));
707: }
708: (*dm)->ltoghook = NULL;
709: }
710: /* Destroy the work arrays */
711: {
712: DMWorkLink link, next;
713: PetscCheck(!(*dm)->workout, PETSC_COMM_SELF, PETSC_ERR_ARG_WRONGSTATE, "Work array still checked out %p %p", (void *)(*dm)->workout, (*dm)->workout->mem);
714: for (link = (*dm)->workin; link; link = next) {
715: next = link->next;
716: PetscCall(PetscFree(link->mem));
717: PetscCall(PetscFree(link));
718: }
719: (*dm)->workin = NULL;
720: }
721: /* destroy the labels */
722: PetscCall(DMDestroyLabelLinkList_Internal(*dm));
723: /* destroy the fields */
724: PetscCall(DMClearFields(*dm));
725: /* destroy the boundaries */
726: {
727: DMBoundary next = (*dm)->boundary;
728: while (next) {
729: DMBoundary b = next;
731: next = b->next;
732: PetscCall(PetscFree(b));
733: }
734: }
736: PetscCall(PetscObjectDestroy(&(*dm)->dmksp));
737: PetscCall(PetscObjectDestroy(&(*dm)->dmsnes));
738: PetscCall(PetscObjectDestroy(&(*dm)->dmts));
740: if ((*dm)->ctx && (*dm)->ctxdestroy) PetscCall((*(*dm)->ctxdestroy)(&(*dm)->ctx));
741: PetscCall(MatFDColoringDestroy(&(*dm)->fd));
742: PetscCall(ISLocalToGlobalMappingDestroy(&(*dm)->ltogmap));
743: PetscCall(PetscFree((*dm)->vectype));
744: PetscCall(PetscFree((*dm)->mattype));
746: PetscCall(PetscSectionDestroy(&(*dm)->localSection));
747: PetscCall(PetscSectionDestroy(&(*dm)->globalSection));
748: PetscCall(PetscFree((*dm)->reorderSectionType));
749: PetscCall(PetscLayoutDestroy(&(*dm)->map));
750: PetscCall(PetscSectionDestroy(&(*dm)->defaultConstraint.section));
751: PetscCall(MatDestroy(&(*dm)->defaultConstraint.mat));
752: PetscCall(PetscSFDestroy(&(*dm)->sf));
753: PetscCall(PetscSFDestroy(&(*dm)->sectionSF));
754: if ((*dm)->sfNatural) PetscCall(PetscSFDestroy(&(*dm)->sfNatural));
755: PetscCall(PetscObjectDereference((PetscObject)(*dm)->sfMigration));
756: PetscCall(DMClearAuxiliaryVec(*dm));
757: PetscCall(PetscHMapAuxDestroy(&(*dm)->auxData));
758: if ((*dm)->coarseMesh && (*dm)->coarseMesh->fineMesh == *dm) PetscCall(DMSetFineDM((*dm)->coarseMesh, NULL));
760: PetscCall(DMDestroy(&(*dm)->coarseMesh));
761: if ((*dm)->fineMesh && (*dm)->fineMesh->coarseMesh == *dm) PetscCall(DMSetCoarseDM((*dm)->fineMesh, NULL));
762: PetscCall(DMDestroy(&(*dm)->fineMesh));
763: PetscCall(PetscFree((*dm)->Lstart));
764: PetscCall(PetscFree((*dm)->L));
765: PetscCall(PetscFree((*dm)->maxCell));
766: PetscCall(DMDestroyCoordinates_Private(&(*dm)->coordinates[0]));
767: PetscCall(DMDestroyCoordinates_Private(&(*dm)->coordinates[1]));
768: if ((*dm)->transformDestroy) PetscCall((*(*dm)->transformDestroy)(*dm, (*dm)->transformCtx));
769: PetscCall(DMDestroy(&(*dm)->transformDM));
770: PetscCall(VecDestroy(&(*dm)->transform));
771: for (PetscInt i = 0; i < (*dm)->periodic.num_affines; i++) {
772: PetscCall(VecScatterDestroy(&(*dm)->periodic.affine_to_local[i]));
773: PetscCall(VecDestroy(&(*dm)->periodic.affine[i]));
774: }
775: if ((*dm)->periodic.num_affines > 0) PetscCall(PetscFree2((*dm)->periodic.affine_to_local, (*dm)->periodic.affine));
777: PetscCall(DMClearDS(*dm));
778: PetscCall(DMDestroy(&(*dm)->dmBC));
779: /* if memory was published with SAWs then destroy it */
780: PetscCall(PetscObjectSAWsViewOff((PetscObject)*dm));
782: PetscTryTypeMethod(*dm, destroy);
783: PetscCall(DMMonitorCancel(*dm));
784: PetscCall(DMCeedDestroy(&(*dm)->dmceed));
785: #ifdef PETSC_HAVE_LIBCEED
786: PetscCallCEED(CeedElemRestrictionDestroy(&(*dm)->ceedERestrict));
787: PetscCallCEED(CeedDestroy(&(*dm)->ceed));
788: #endif
789: /* We do not destroy (*dm)->data here so that we can reference count backend objects */
790: PetscCall(PetscHeaderDestroy(dm));
791: PetscFunctionReturn(PETSC_SUCCESS);
792: }
794: /*@
795: DMSetUp - sets up the data structures inside a `DM` object
797: Collective
799: Input Parameter:
800: . dm - the `DM` object to setup
802: Level: intermediate
804: Note:
805: This is usually called after various parameter setting operations and `DMSetFromOptions()` are called on the `DM`
807: .seealso: [](ch_dmbase), `DM`, `DMCreate()`, `DMSetType()`, `DMView()`, `DMCreateGlobalVector()`, `DMCreateInterpolation()`, `DMCreateColoring()`, `DMCreateMatrix()`
808: @*/
809: PetscErrorCode DMSetUp(DM dm)
810: {
811: PetscFunctionBegin;
813: if (dm->setupcalled) PetscFunctionReturn(PETSC_SUCCESS);
814: PetscTryTypeMethod(dm, setup);
815: dm->setupcalled = PETSC_TRUE;
816: PetscFunctionReturn(PETSC_SUCCESS);
817: }
819: /*@
820: DMSetFromOptions - sets parameters in a `DM` from the options database
822: Collective
824: Input Parameter:
825: . dm - the `DM` object to set options for
827: Options Database Keys:
828: + -dm_preallocate_only - Only preallocate the matrix for `DMCreateMatrix()` and `DMCreateMassMatrix()`, but do not fill it with zeros
829: . -dm_vec_type <type> - type of vector to create inside `DM`
830: . -dm_mat_type <type> - type of matrix to create inside `DM`
831: . -dm_is_coloring_type - <global or local>
832: . -dm_bind_below <n> - bind (force execution on CPU) for `Vec` and `Mat` objects with local size (number of vector entries or matrix rows) below n; currently only supported for `DMDA`
833: . -dm_plex_option_phases <ph0_, ph1_, ...> - List of prefixes for option processing phases
834: . -dm_plex_filename <str> - File containing a mesh
835: . -dm_plex_boundary_filename <str> - File containing a mesh boundary
836: . -dm_plex_name <str> - Name of the mesh in the file
837: . -dm_plex_shape <shape> - The domain shape, such as `BOX`, `SPHERE`, etc.
838: . -dm_plex_cell <ct> - Cell shape
839: . -dm_plex_reference_cell_domain <bool> - Use a reference cell domain
840: . -dm_plex_dim <dim> - Set the topological dimension
841: . -dm_plex_simplex <bool> - `PETSC_TRUE` for simplex elements, `PETSC_FALSE` for tensor elements
842: . -dm_plex_interpolate <bool> - `PETSC_TRUE` turns on topological interpolation (creating edges and faces)
843: . -dm_plex_orient <bool> - `PETSC_TRUE` turns on topological orientation (flipping edges and faces)
844: . -dm_plex_scale <sc> - Scale factor for mesh coordinates
845: . -dm_coord_remap <bool> - Map coordinates using a function
846: . -dm_coord_map <mapname> - Select a builtin coordinate map
847: . -dm_coord_map_params <p0,p1,p2,...> - Set coordinate mapping parameters
848: . -dm_plex_box_faces <m,n,p> - Number of faces along each dimension
849: . -dm_plex_box_lower <x,y,z> - Specify lower-left-bottom coordinates for the box
850: . -dm_plex_box_upper <x,y,z> - Specify upper-right-top coordinates for the box
851: . -dm_plex_box_bd <bx,by,bz> - Specify the `DMBoundaryType` for each direction
852: . -dm_plex_sphere_radius <r> - The sphere radius
853: . -dm_plex_ball_radius <r> - Radius of the ball
854: . -dm_plex_cylinder_bd <bz> - Boundary type in the z direction
855: . -dm_plex_cylinder_num_wedges <n> - Number of wedges around the cylinder
856: . -dm_plex_reorder <order> - Reorder the mesh using the specified algorithm
857: . -dm_refine_pre <n> - The number of refinements before distribution
858: . -dm_refine_uniform_pre <bool> - Flag for uniform refinement before distribution
859: . -dm_refine_volume_limit_pre <v> - The maximum cell volume after refinement before distribution
860: . -dm_refine <n> - The number of refinements after distribution
861: . -dm_extrude <l> - Activate extrusion and specify the number of layers to extrude
862: . -dm_plex_transform_extrude_thickness <t> - The total thickness of extruded layers
863: . -dm_plex_transform_extrude_use_tensor <bool> - Use tensor cells when extruding
864: . -dm_plex_transform_extrude_symmetric <bool> - Extrude layers symmetrically about the surface
865: . -dm_plex_transform_extrude_normal <n0,...,nd> - Specify the extrusion direction
866: . -dm_plex_transform_extrude_thicknesses <t0,...,tl> - Specify thickness of each layer
867: . -dm_plex_create_fv_ghost_cells - Flag to create finite volume ghost cells on the boundary
868: . -dm_plex_fv_ghost_cells_label <name> - Label name for ghost cells boundary
869: . -dm_distribute <bool> - Flag to redistribute a mesh among processes
870: . -dm_distribute_overlap <n> - The size of the overlap halo
871: . -dm_plex_adj_cone <bool> - Set adjacency direction
872: . -dm_plex_adj_closure <bool> - Set adjacency size
873: . -dm_plex_use_ceed <bool> - Use LibCEED as the FEM backend
874: . -dm_plex_check_symmetry - Check that the adjacency information in the mesh is symmetric - `DMPlexCheckSymmetry()`
875: . -dm_plex_check_skeleton - Check that each cell has the correct number of vertices (only for homogeneous simplex or tensor meshes) - `DMPlexCheckSkeleton()`
876: . -dm_plex_check_faces - Check that the faces of each cell give a vertex order this is consistent with what we expect from the cell type - `DMPlexCheckFaces()`
877: . -dm_plex_check_geometry - Check that cells have positive volume - `DMPlexCheckGeometry()`
878: . -dm_plex_check_pointsf - Check some necessary conditions for `PointSF` - `DMPlexCheckPointSF()`
879: . -dm_plex_check_interface_cones - Check points on inter-partition interfaces have conforming order of cone points - `DMPlexCheckInterfaceCones()`
880: - -dm_plex_check_all - Perform all the checks above
882: Level: intermediate
884: Note:
885: For some `DMType` such as `DMDA` this cannot be called after `DMSetUp()` has been called.
887: .seealso: [](ch_dmbase), `DM`, `DMView()`, `DMCreateGlobalVector()`, `DMCreateInterpolation()`, `DMCreateColoring()`, `DMCreateMatrix()`,
888: `DMPlexCheckSymmetry()`, `DMPlexCheckSkeleton()`, `DMPlexCheckFaces()`, `DMPlexCheckGeometry()`, `DMPlexCheckPointSF()`, `DMPlexCheckInterfaceCones()`,
889: `DMSetOptionsPrefix()`, `DMType`, `DMPLEX`, `DMDA`, `DMSetUp()`
890: @*/
891: PetscErrorCode DMSetFromOptions(DM dm)
892: {
893: char typeName[256];
894: PetscBool flg;
896: PetscFunctionBegin;
898: dm->setfromoptionscalled = PETSC_TRUE;
899: if (dm->sf) PetscCall(PetscSFSetFromOptions(dm->sf));
900: if (dm->sectionSF) PetscCall(PetscSFSetFromOptions(dm->sectionSF));
901: if (dm->coordinates[0].dm) PetscCall(DMSetFromOptions(dm->coordinates[0].dm));
902: PetscObjectOptionsBegin((PetscObject)dm);
903: PetscCall(PetscOptionsBool("-dm_preallocate_only", "only preallocate matrix, but do not set column indices", "DMSetMatrixPreallocateOnly", dm->prealloc_only, &dm->prealloc_only, NULL));
904: PetscCall(PetscOptionsFList("-dm_vec_type", "Vector type used for created vectors", "DMSetVecType", VecList, dm->vectype, typeName, 256, &flg));
905: if (flg) PetscCall(DMSetVecType(dm, typeName));
906: PetscCall(PetscOptionsFList("-dm_mat_type", "Matrix type used for created matrices", "DMSetMatType", MatList, dm->mattype ? dm->mattype : typeName, typeName, sizeof(typeName), &flg));
907: if (flg) PetscCall(DMSetMatType(dm, typeName));
908: PetscCall(PetscOptionsEnum("-dm_blocking_type", "Topological point or field node blocking", "DMSetBlockingType", DMBlockingTypes, (PetscEnum)dm->blocking_type, (PetscEnum *)&dm->blocking_type, NULL));
909: PetscCall(PetscOptionsEnum("-dm_is_coloring_type", "Global or local coloring of Jacobian", "DMSetISColoringType", ISColoringTypes, (PetscEnum)dm->coloringtype, (PetscEnum *)&dm->coloringtype, NULL));
910: PetscCall(PetscOptionsInt("-dm_bind_below", "Set the size threshold (in entries) below which the Vec is bound to the CPU", "VecBindToCPU", dm->bind_below, &dm->bind_below, &flg));
911: PetscCall(PetscOptionsBool("-dm_ignore_perm_output", "Ignore the local section permutation on output", "DMGetOutputDM", dm->ignorePermOutput, &dm->ignorePermOutput, NULL));
912: PetscTryTypeMethod(dm, setfromoptions, PetscOptionsObject);
913: /* process any options handlers added with PetscObjectAddOptionsHandler() */
914: PetscCall(PetscObjectProcessOptionsHandlers((PetscObject)dm, PetscOptionsObject));
915: PetscOptionsEnd();
916: PetscFunctionReturn(PETSC_SUCCESS);
917: }
919: /*@
920: DMViewFromOptions - View a `DM` in a particular way based on a request in the options database
922: Collective
924: Input Parameters:
925: + dm - the `DM` object
926: . obj - optional object that provides the prefix for the options database (if `NULL` then the prefix in obj is used)
927: - name - option string that is used to activate viewing
929: Level: intermediate
931: Note:
932: See `PetscObjectViewFromOptions()` for a list of values that can be provided in the options database to determine how the `DM` is viewed
934: .seealso: [](ch_dmbase), `DM`, `DMView()`, `PetscObjectViewFromOptions()`, `DMCreate()`
935: @*/
936: PetscErrorCode DMViewFromOptions(DM dm, PetscObject obj, const char name[])
937: {
938: PetscFunctionBegin;
940: PetscCall(PetscObjectViewFromOptions((PetscObject)dm, obj, name));
941: PetscFunctionReturn(PETSC_SUCCESS);
942: }
944: /*@
945: DMView - Views a `DM`. Depending on the `PetscViewer` and its `PetscViewerFormat` it may print some ASCII information about the `DM` to the screen or a file or
946: save the `DM` in a binary file to be loaded later or create a visualization of the `DM`
948: Collective
950: Input Parameters:
951: + dm - the `DM` object to view
952: - v - the viewer
954: Level: beginner
956: Notes:
958: `PetscViewer` = `PETSCVIEWERHDF5` i.e. HDF5 format can be used with `PETSC_VIEWER_HDF5_PETSC` as the `PetscViewerFormat` to save multiple `DMPLEX`
959: meshes in a single HDF5 file. This in turn requires one to name the `DMPLEX` object with `PetscObjectSetName()`
960: before saving it with `DMView()` and before loading it with `DMLoad()` for identification of the mesh object.
962: `PetscViewer` = `PETSCVIEWEREXODUSII` i.e. ExodusII format assumes that element blocks (mapped to "Cell sets" labels)
963: consists of sequentially numbered cells.
965: If `dm` has been distributed, only the part of the `DM` on MPI rank 0 (including "ghost" cells and vertices) will be written.
967: Only TRI, TET, QUAD, and HEX cells are supported.
969: `DMPLEX` only represents geometry while most post-processing software expect that a mesh also provides information on the discretization space. This function assumes that the file represents Lagrange finite elements of order 1 or 2.
970: The order of the mesh shall be set using `PetscViewerExodusIISetOrder()`
972: Variable names can be set and queried using `PetscViewerExodusII[Set/Get][Nodal/Zonal]VariableNames[s]`.
974: .seealso: [](ch_dmbase), `DM`, `PetscViewer`, `PetscViewerFormat`, `PetscViewerSetFormat()`, `DMDestroy()`, `DMCreateGlobalVector()`, `DMCreateInterpolation()`, `DMCreateColoring()`, `DMCreateMatrix()`, `DMCreateMassMatrix()`, `DMLoad()`, `PetscObjectSetName()`
975: @*/
976: PetscErrorCode DMView(DM dm, PetscViewer v)
977: {
978: PetscBool isbinary;
979: PetscMPIInt size;
980: PetscViewerFormat format;
982: PetscFunctionBegin;
984: if (!v) PetscCall(PetscViewerASCIIGetStdout(PetscObjectComm((PetscObject)dm), &v));
986: /* Ideally, we would like to have this test on.
987: However, it currently breaks socket viz via GLVis.
988: During DMView(parallel_mesh,glvis_viewer), each
989: process opens a sequential ASCII socket to visualize
990: the local mesh, and PetscObjectView(dm,local_socket)
991: is internally called inside VecView_GLVis, incurring
992: in an error here */
993: /* PetscCheckSameComm(dm,1,v,2); */
994: PetscCall(PetscViewerCheckWritable(v));
996: PetscCall(PetscLogEventBegin(DM_View, v, 0, 0, 0));
997: PetscCall(PetscViewerGetFormat(v, &format));
998: PetscCallMPI(MPI_Comm_size(PetscObjectComm((PetscObject)dm), &size));
999: if (size == 1 && format == PETSC_VIEWER_LOAD_BALANCE) PetscFunctionReturn(PETSC_SUCCESS);
1000: PetscCall(PetscObjectPrintClassNamePrefixType((PetscObject)dm, v));
1001: PetscCall(PetscObjectTypeCompare((PetscObject)v, PETSCVIEWERBINARY, &isbinary));
1002: if (isbinary) {
1003: PetscInt classid = DM_FILE_CLASSID;
1004: char type[256];
1006: PetscCall(PetscViewerBinaryWrite(v, &classid, 1, PETSC_INT));
1007: PetscCall(PetscStrncpy(type, ((PetscObject)dm)->type_name, sizeof(type)));
1008: PetscCall(PetscViewerBinaryWrite(v, type, 256, PETSC_CHAR));
1009: }
1010: PetscTryTypeMethod(dm, view, v);
1011: PetscCall(PetscLogEventEnd(DM_View, v, 0, 0, 0));
1012: PetscFunctionReturn(PETSC_SUCCESS);
1013: }
1015: /*@
1016: DMCreateGlobalVector - Creates a global vector from a `DM` object. A global vector is a parallel vector that has no duplicate values shared between MPI ranks,
1017: that is it has no ghost locations.
1019: Collective
1021: Input Parameter:
1022: . dm - the `DM` object
1024: Output Parameter:
1025: . vec - the global vector
1027: Level: beginner
1029: .seealso: [](ch_dmbase), `DM`, `Vec`, `DMCreateLocalVector()`, `DMGetGlobalVector()`, `DMDestroy()`, `DMView()`, `DMCreateInterpolation()`, `DMCreateColoring()`, `DMCreateMatrix()`,
1030: `DMGlobalToLocalBegin()`, `DMGlobalToLocalEnd()`
1031: @*/
1032: PetscErrorCode DMCreateGlobalVector(DM dm, Vec *vec)
1033: {
1034: PetscFunctionBegin;
1036: PetscAssertPointer(vec, 2);
1037: PetscUseTypeMethod(dm, createglobalvector, vec);
1038: if (PetscDefined(USE_DEBUG)) {
1039: DM vdm;
1041: PetscCall(VecGetDM(*vec, &vdm));
1042: PetscCheck(vdm, PETSC_COMM_SELF, PETSC_ERR_PLIB, "DM type '%s' did not attach the DM to the vector", ((PetscObject)dm)->type_name);
1043: }
1044: PetscFunctionReturn(PETSC_SUCCESS);
1045: }
1047: /*@
1048: DMCreateLocalVector - Creates a local vector from a `DM` object.
1050: Not Collective
1052: Input Parameter:
1053: . dm - the `DM` object
1055: Output Parameter:
1056: . vec - the local vector
1058: Level: beginner
1060: Note:
1061: A local vector usually has ghost locations that contain values that are owned by different MPI ranks. A global vector has no ghost locations.
1063: .seealso: [](ch_dmbase), `DM`, `Vec`, `DMCreateGlobalVector()`, `DMGetLocalVector()`, `DMDestroy()`, `DMView()`, `DMCreateInterpolation()`, `DMCreateColoring()`, `DMCreateMatrix()`
1064: `DMGlobalToLocalBegin()`, `DMGlobalToLocalEnd()`
1065: @*/
1066: PetscErrorCode DMCreateLocalVector(DM dm, Vec *vec)
1067: {
1068: PetscFunctionBegin;
1070: PetscAssertPointer(vec, 2);
1071: PetscUseTypeMethod(dm, createlocalvector, vec);
1072: if (PetscDefined(USE_DEBUG)) {
1073: DM vdm;
1075: PetscCall(VecGetDM(*vec, &vdm));
1076: PetscCheck(vdm, PETSC_COMM_SELF, PETSC_ERR_LIB, "DM type '%s' did not attach the DM to the vector", ((PetscObject)dm)->type_name);
1077: }
1078: PetscFunctionReturn(PETSC_SUCCESS);
1079: }
1081: /*@
1082: DMGetLocalToGlobalMapping - Accesses the local-to-global mapping in a `DM`.
1084: Collective
1086: Input Parameter:
1087: . dm - the `DM` that provides the mapping
1089: Output Parameter:
1090: . ltog - the mapping
1092: Level: advanced
1094: Notes:
1095: The global to local mapping allows one to set values into the global vector or matrix using `VecSetValuesLocal()` and `MatSetValuesLocal()`
1097: Vectors obtained with `DMCreateGlobalVector()` and matrices obtained with `DMCreateMatrix()` already contain the global mapping so you do
1098: need to use this function with those objects.
1100: This mapping can then be used by `VecSetLocalToGlobalMapping()` or `MatSetLocalToGlobalMapping()`.
1102: .seealso: [](ch_dmbase), `DM`, `DMCreateLocalVector()`, `DMCreateGlobalVector()`, `VecSetLocalToGlobalMapping()`, `MatSetLocalToGlobalMapping()`,
1103: `DMCreateMatrix()`
1104: @*/
1105: PetscErrorCode DMGetLocalToGlobalMapping(DM dm, ISLocalToGlobalMapping *ltog)
1106: {
1107: PetscInt bs = -1, bsLocal[2], bsMinMax[2];
1109: PetscFunctionBegin;
1111: PetscAssertPointer(ltog, 2);
1112: if (!dm->ltogmap) {
1113: PetscSection section, sectionGlobal;
1115: PetscCall(DMGetLocalSection(dm, §ion));
1116: if (section) {
1117: const PetscInt *cdofs;
1118: PetscInt *ltog;
1119: PetscInt pStart, pEnd, n, p, k, l;
1121: PetscCall(DMGetGlobalSection(dm, §ionGlobal));
1122: PetscCall(PetscSectionGetChart(section, &pStart, &pEnd));
1123: PetscCall(PetscSectionGetStorageSize(section, &n));
1124: PetscCall(PetscMalloc1(n, <og)); /* We want the local+overlap size */
1125: for (p = pStart, l = 0; p < pEnd; ++p) {
1126: PetscInt bdof, cdof, dof, off, c, cind;
1128: /* Should probably use constrained dofs */
1129: PetscCall(PetscSectionGetDof(section, p, &dof));
1130: PetscCall(PetscSectionGetConstraintDof(section, p, &cdof));
1131: PetscCall(PetscSectionGetConstraintIndices(section, p, &cdofs));
1132: PetscCall(PetscSectionGetOffset(sectionGlobal, p, &off));
1133: /* If you have dofs, and constraints, and they are unequal, we set the blocksize to 1 */
1134: bdof = cdof && (dof - cdof) ? 1 : dof;
1135: if (dof) bs = bs < 0 ? bdof : PetscGCD(bs, bdof);
1137: for (c = 0, cind = 0; c < dof; ++c, ++l) {
1138: if (cind < cdof && c == cdofs[cind]) {
1139: ltog[l] = off < 0 ? off - c : -(off + c + 1);
1140: cind++;
1141: } else {
1142: ltog[l] = (off < 0 ? -(off + 1) : off) + c - cind;
1143: }
1144: }
1145: }
1146: /* Must have same blocksize on all procs (some might have no points) */
1147: bsLocal[0] = bs < 0 ? PETSC_INT_MAX : bs;
1148: bsLocal[1] = bs;
1149: PetscCall(PetscGlobalMinMaxInt(PetscObjectComm((PetscObject)dm), bsLocal, bsMinMax));
1150: if (bsMinMax[0] != bsMinMax[1]) {
1151: bs = 1;
1152: } else {
1153: bs = bsMinMax[0];
1154: }
1155: bs = bs < 0 ? 1 : bs;
1156: /* Must reduce indices by blocksize */
1157: if (bs > 1) {
1158: for (l = 0, k = 0; l < n; l += bs, ++k) {
1159: // Integer division of negative values truncates toward zero(!), not toward negative infinity
1160: ltog[k] = ltog[l] >= 0 ? ltog[l] / bs : -(-(ltog[l] + 1) / bs + 1);
1161: }
1162: n /= bs;
1163: }
1164: PetscCall(ISLocalToGlobalMappingCreate(PetscObjectComm((PetscObject)dm), bs, n, ltog, PETSC_OWN_POINTER, &dm->ltogmap));
1165: } else PetscUseTypeMethod(dm, getlocaltoglobalmapping);
1166: }
1167: *ltog = dm->ltogmap;
1168: PetscFunctionReturn(PETSC_SUCCESS);
1169: }
1171: /*@
1172: DMGetBlockSize - Gets the inherent block size associated with a `DM`
1174: Not Collective
1176: Input Parameter:
1177: . dm - the `DM` with block structure
1179: Output Parameter:
1180: . bs - the block size, 1 implies no exploitable block structure
1182: Level: intermediate
1184: Notes:
1185: This might be the number of degrees of freedom at each grid point for a structured grid.
1187: Complex `DM` that represent multiphysics or staggered grids or mixed-methods do not generally have a single inherent block size, but
1188: rather different locations in the vectors may have a different block size.
1190: .seealso: [](ch_dmbase), `DM`, `ISCreateBlock()`, `VecSetBlockSize()`, `MatSetBlockSize()`, `DMGetLocalToGlobalMapping()`
1191: @*/
1192: PetscErrorCode DMGetBlockSize(DM dm, PetscInt *bs)
1193: {
1194: PetscFunctionBegin;
1196: PetscAssertPointer(bs, 2);
1197: PetscCheck(dm->bs >= 1, PETSC_COMM_SELF, PETSC_ERR_ARG_WRONGSTATE, "DM does not have enough information to provide a block size yet");
1198: *bs = dm->bs;
1199: PetscFunctionReturn(PETSC_SUCCESS);
1200: }
1202: /*@
1203: DMCreateInterpolation - Gets the interpolation matrix between two `DM` objects. The resulting matrix map degrees of freedom in the vector obtained by
1204: `DMCreateGlobalVector()` on the coarse `DM` to similar vectors on the fine grid `DM`.
1206: Collective
1208: Input Parameters:
1209: + dmc - the `DM` object
1210: - dmf - the second, finer `DM` object
1212: Output Parameters:
1213: + mat - the interpolation
1214: - vec - the scaling (optional, pass `NULL` if not needed), see `DMCreateInterpolationScale()`
1216: Level: developer
1218: Notes:
1219: For `DMDA` objects this only works for "uniform refinement", that is the refined mesh was obtained `DMRefine()` or the coarse mesh was obtained by
1220: DMCoarsen(). The coordinates set into the `DMDA` are completely ignored in computing the interpolation.
1222: For `DMDA` objects you can use this interpolation (more precisely the interpolation from the `DMGetCoordinateDM()`) to interpolate the mesh coordinate
1223: vectors EXCEPT in the periodic case where it does not make sense since the coordinate vectors are not periodic.
1225: .seealso: [](ch_dmbase), `DM`, `DMDestroy()`, `DMView()`, `DMCreateGlobalVector()`, `DMCreateColoring()`, `DMCreateMatrix()`, `DMCreateMassMatrix()`, `DMRefine()`, `DMCoarsen()`, `DMCreateRestriction()`, `DMCreateInterpolationScale()`
1226: @*/
1227: PetscErrorCode DMCreateInterpolation(DM dmc, DM dmf, Mat *mat, Vec *vec)
1228: {
1229: PetscFunctionBegin;
1232: PetscAssertPointer(mat, 3);
1233: PetscCall(PetscLogEventBegin(DM_CreateInterpolation, dmc, dmf, 0, 0));
1234: PetscUseTypeMethod(dmc, createinterpolation, dmf, mat, vec);
1235: PetscCall(PetscLogEventEnd(DM_CreateInterpolation, dmc, dmf, 0, 0));
1236: PetscFunctionReturn(PETSC_SUCCESS);
1237: }
1239: /*@
1240: DMCreateInterpolationScale - Forms L = 1/(R*1) where 1 is the vector of all ones, and R is
1241: the transpose of the interpolation between the `DM`.
1243: Input Parameters:
1244: + dac - `DM` that defines a coarse mesh
1245: . daf - `DM` that defines a fine mesh
1246: - mat - the restriction (or interpolation operator) from fine to coarse
1248: Output Parameter:
1249: . scale - the scaled vector
1251: Level: advanced
1253: Note:
1254: xcoarse = diag(L)*R*xfine preserves scale and is thus suitable for state (versus residual)
1255: restriction. In other words xcoarse is the coarse representation of xfine.
1257: Developer Note:
1258: If the fine-scale `DMDA` has the -dm_bind_below option set to true, then `DMCreateInterpolationScale()` calls `MatSetBindingPropagates()`
1259: on the restriction/interpolation operator to set the bindingpropagates flag to true.
1261: .seealso: [](ch_dmbase), `DM`, `MatRestrict()`, `MatInterpolate()`, `DMCreateInterpolation()`, `DMCreateRestriction()`, `DMCreateGlobalVector()`
1262: @*/
1263: PetscErrorCode DMCreateInterpolationScale(DM dac, DM daf, Mat mat, Vec *scale)
1264: {
1265: Vec fine;
1266: PetscScalar one = 1.0;
1267: #if defined(PETSC_HAVE_CUDA)
1268: PetscBool bindingpropagates, isbound;
1269: #endif
1271: PetscFunctionBegin;
1272: PetscCall(DMCreateGlobalVector(daf, &fine));
1273: PetscCall(DMCreateGlobalVector(dac, scale));
1274: PetscCall(VecSet(fine, one));
1275: #if defined(PETSC_HAVE_CUDA)
1276: /* If the 'fine' Vec is bound to the CPU, it makes sense to bind 'mat' as well.
1277: * Note that we only do this for the CUDA case, right now, but if we add support for MatMultTranspose() via ViennaCL,
1278: * we'll need to do it for that case, too.*/
1279: PetscCall(VecGetBindingPropagates(fine, &bindingpropagates));
1280: if (bindingpropagates) {
1281: PetscCall(MatSetBindingPropagates(mat, PETSC_TRUE));
1282: PetscCall(VecBoundToCPU(fine, &isbound));
1283: PetscCall(MatBindToCPU(mat, isbound));
1284: }
1285: #endif
1286: PetscCall(MatRestrict(mat, fine, *scale));
1287: PetscCall(VecDestroy(&fine));
1288: PetscCall(VecReciprocal(*scale));
1289: PetscFunctionReturn(PETSC_SUCCESS);
1290: }
1292: /*@
1293: DMCreateRestriction - Gets restriction matrix between two `DM` objects. The resulting matrix map degrees of freedom in the vector obtained by
1294: `DMCreateGlobalVector()` on the fine `DM` to similar vectors on the coarse grid `DM`.
1296: Collective
1298: Input Parameters:
1299: + dmc - the `DM` object
1300: - dmf - the second, finer `DM` object
1302: Output Parameter:
1303: . mat - the restriction
1305: Level: developer
1307: Note:
1308: This only works for `DMSTAG`. For many situations either the transpose of the operator obtained with `DMCreateInterpolation()` or that
1309: matrix multiplied by the vector obtained with `DMCreateInterpolationScale()` provides the desired object.
1311: .seealso: [](ch_dmbase), `DM`, `DMRestrict()`, `DMInterpolate()`, `DMDestroy()`, `DMView()`, `DMCreateGlobalVector()`, `DMCreateColoring()`, `DMCreateMatrix()`, `DMCreateMassMatrix()`, `DMRefine()`, `DMCoarsen()`, `DMCreateInterpolation()`
1312: @*/
1313: PetscErrorCode DMCreateRestriction(DM dmc, DM dmf, Mat *mat)
1314: {
1315: PetscFunctionBegin;
1318: PetscAssertPointer(mat, 3);
1319: PetscCall(PetscLogEventBegin(DM_CreateRestriction, dmc, dmf, 0, 0));
1320: PetscUseTypeMethod(dmc, createrestriction, dmf, mat);
1321: PetscCall(PetscLogEventEnd(DM_CreateRestriction, dmc, dmf, 0, 0));
1322: PetscFunctionReturn(PETSC_SUCCESS);
1323: }
1325: /*@
1326: DMCreateInjection - Gets injection matrix between two `DM` objects.
1328: Collective
1330: Input Parameters:
1331: + dac - the `DM` object
1332: - daf - the second, finer `DM` object
1334: Output Parameter:
1335: . mat - the injection
1337: Level: developer
1339: Notes:
1340: This is an operator that applied to a vector obtained with `DMCreateGlobalVector()` on the
1341: fine grid maps the values to a vector on the vector on the coarse `DM` by simply selecting
1342: the values on the coarse grid points. This compares to the operator obtained by
1343: `DMCreateRestriction()` or the transpose of the operator obtained by
1344: `DMCreateInterpolation()` that uses a "local weighted average" of the values around the
1345: coarse grid point as the coarse grid value.
1347: For `DMDA` objects this only works for "uniform refinement", that is the refined mesh was obtained `DMRefine()` or the coarse mesh was obtained by
1348: `DMCoarsen()`. The coordinates set into the `DMDA` are completely ignored in computing the injection.
1350: .seealso: [](ch_dmbase), `DM`, `DMDestroy()`, `DMView()`, `DMCreateGlobalVector()`, `DMCreateColoring()`, `DMCreateMatrix()`, `DMCreateMassMatrix()`, `DMCreateInterpolation()`,
1351: `DMCreateRestriction()`, `MatRestrict()`, `MatInterpolate()`
1352: @*/
1353: PetscErrorCode DMCreateInjection(DM dac, DM daf, Mat *mat)
1354: {
1355: PetscFunctionBegin;
1358: PetscAssertPointer(mat, 3);
1359: PetscCall(PetscLogEventBegin(DM_CreateInjection, dac, daf, 0, 0));
1360: PetscUseTypeMethod(dac, createinjection, daf, mat);
1361: PetscCall(PetscLogEventEnd(DM_CreateInjection, dac, daf, 0, 0));
1362: PetscFunctionReturn(PETSC_SUCCESS);
1363: }
1365: /*@
1366: DMCreateMassMatrix - Gets the mass matrix between two `DM` objects, M_ij = \int \phi_i \psi_j where the \phi are Galerkin basis functions for a
1367: a Galerkin finite element model on the `DM`
1369: Collective
1371: Input Parameters:
1372: + dmc - the target `DM` object
1373: - dmf - the source `DM` object, can be `NULL`
1375: Output Parameter:
1376: . mat - the mass matrix
1378: Level: developer
1380: Notes:
1381: For `DMPLEX` the finite element model for the `DM` must have been already provided.
1383: if `dmc` is `dmf` or `NULL`, then x^t M x is an approximation to the L2 norm of the vector x which is obtained by `DMCreateGlobalVector()`
1385: .seealso: [](ch_dmbase), `DM`, `DMCreateMassMatrixLumped()`, `DMCreateMatrix()`, `DMRefine()`, `DMCoarsen()`, `DMCreateRestriction()`, `DMCreateInterpolation()`, `DMCreateInjection()`
1386: @*/
1387: PetscErrorCode DMCreateMassMatrix(DM dmc, DM dmf, Mat *mat)
1388: {
1389: PetscFunctionBegin;
1391: if (!dmf) dmf = dmc;
1393: PetscAssertPointer(mat, 3);
1394: PetscCall(PetscLogEventBegin(DM_CreateMassMatrix, dmc, dmf, 0, 0));
1395: PetscUseTypeMethod(dmc, createmassmatrix, dmf, mat);
1396: PetscCall(PetscLogEventEnd(DM_CreateMassMatrix, dmc, dmf, 0, 0));
1397: PetscFunctionReturn(PETSC_SUCCESS);
1398: }
1400: /*@
1401: DMCreateMassMatrixLumped - Gets the lumped mass matrix for a given `DM`
1403: Collective
1405: Input Parameter:
1406: . dm - the `DM` object
1408: Output Parameters:
1409: + llm - the local lumped mass matrix, which is a diagonal matrix, represented as a vector
1410: - lm - the global lumped mass matrix, which is a diagonal matrix, represented as a vector
1412: Level: developer
1414: Note:
1415: See `DMCreateMassMatrix()` for how to create the non-lumped version of the mass matrix.
1417: .seealso: [](ch_dmbase), `DM`, `DMCreateMassMatrix()`, `DMCreateMatrix()`, `DMRefine()`, `DMCoarsen()`, `DMCreateRestriction()`, `DMCreateInterpolation()`, `DMCreateInjection()`
1418: @*/
1419: PetscErrorCode DMCreateMassMatrixLumped(DM dm, Vec *llm, Vec *lm)
1420: {
1421: PetscFunctionBegin;
1423: if (llm) PetscAssertPointer(llm, 2);
1424: if (lm) PetscAssertPointer(lm, 3);
1425: if (llm || lm) PetscUseTypeMethod(dm, createmassmatrixlumped, llm, lm);
1426: PetscFunctionReturn(PETSC_SUCCESS);
1427: }
1429: /*@
1430: DMCreateColoring - Gets coloring of a graph associated with the `DM`. Often the graph represents the operator matrix associated with the discretization
1431: of a PDE on the `DM`.
1433: Collective
1435: Input Parameters:
1436: + dm - the `DM` object
1437: - ctype - `IS_COLORING_LOCAL` or `IS_COLORING_GLOBAL`
1439: Output Parameter:
1440: . coloring - the coloring
1442: Level: developer
1444: Notes:
1445: Coloring of matrices can also be computed directly from the sparse matrix nonzero structure via the `MatColoring` object or from the mesh from which the
1446: matrix comes from (what this function provides). In general using the mesh produces a more optimal coloring (fewer colors).
1448: This produces a coloring with the distance of 2, see `MatSetColoringDistance()` which can be used for efficiently computing Jacobians with `MatFDColoringCreate()`
1449: For `DMDA` in three dimensions with periodic boundary conditions the number of grid points in each dimension must be divisible by 2*stencil_width + 1,
1450: otherwise an error will be generated.
1452: .seealso: [](ch_dmbase), `DM`, `ISColoring`, `DMDestroy()`, `DMView()`, `DMCreateGlobalVector()`, `DMCreateInterpolation()`, `DMCreateMatrix()`, `DMCreateMassMatrix()`, `DMSetMatType()`, `MatColoring`, `MatFDColoringCreate()`
1453: @*/
1454: PetscErrorCode DMCreateColoring(DM dm, ISColoringType ctype, ISColoring *coloring)
1455: {
1456: PetscFunctionBegin;
1458: PetscAssertPointer(coloring, 3);
1459: PetscUseTypeMethod(dm, getcoloring, ctype, coloring);
1460: PetscFunctionReturn(PETSC_SUCCESS);
1461: }
1463: /*@
1464: DMCreateMatrix - Gets an empty matrix for a `DM` that is most commonly used to store the Jacobian of a discrete PDE operator.
1466: Collective
1468: Input Parameter:
1469: . dm - the `DM` object
1471: Output Parameter:
1472: . mat - the empty Jacobian
1474: Options Database Key:
1475: . -dm_preallocate_only - Only preallocate the matrix for `DMCreateMatrix()` and `DMCreateMassMatrix()`, but do not fill it with zeros
1477: Level: beginner
1479: Notes:
1480: This properly preallocates the number of nonzeros in the sparse matrix so you
1481: do not need to do it yourself.
1483: By default it also sets the nonzero structure and puts in the zero entries. To prevent setting
1484: the nonzero pattern call `DMSetMatrixPreallocateOnly()`
1486: For `DMDA`, when you call `MatView()` on this matrix it is displayed using the global natural ordering, NOT in the ordering used
1487: internally by PETSc.
1489: For `DMDA`, in general it is easiest to use `MatSetValuesStencil()` or `MatSetValuesLocal()` to put values into the matrix because
1490: `MatSetValues()` requires the indices for the global numbering for the `DMDA` which is complic`ated to compute
1492: .seealso: [](ch_dmbase), `DM`, `DMDestroy()`, `DMView()`, `DMCreateGlobalVector()`, `DMCreateInterpolation()`, `DMSetMatType()`, `DMCreateMassMatrix()`
1493: @*/
1494: PetscErrorCode DMCreateMatrix(DM dm, Mat *mat)
1495: {
1496: PetscFunctionBegin;
1498: PetscAssertPointer(mat, 2);
1499: PetscCall(MatInitializePackage());
1500: PetscCall(PetscLogEventBegin(DM_CreateMatrix, 0, 0, 0, 0));
1501: PetscUseTypeMethod(dm, creatematrix, mat);
1502: if (PetscDefined(USE_DEBUG)) {
1503: DM mdm;
1505: PetscCall(MatGetDM(*mat, &mdm));
1506: PetscCheck(mdm, PETSC_COMM_SELF, PETSC_ERR_PLIB, "DM type '%s' did not attach the DM to the matrix", ((PetscObject)dm)->type_name);
1507: }
1508: /* Handle nullspace and near nullspace */
1509: if (dm->Nf) {
1510: MatNullSpace nullSpace;
1511: PetscInt Nf, f;
1513: PetscCall(DMGetNumFields(dm, &Nf));
1514: for (f = 0; f < Nf; ++f) {
1515: if (dm->nullspaceConstructors[f]) {
1516: PetscCall((*dm->nullspaceConstructors[f])(dm, f, f, &nullSpace));
1517: PetscCall(MatSetNullSpace(*mat, nullSpace));
1518: PetscCall(MatNullSpaceDestroy(&nullSpace));
1519: break;
1520: }
1521: }
1522: for (f = 0; f < Nf; ++f) {
1523: if (dm->nearnullspaceConstructors[f]) {
1524: PetscCall((*dm->nearnullspaceConstructors[f])(dm, f, f, &nullSpace));
1525: PetscCall(MatSetNearNullSpace(*mat, nullSpace));
1526: PetscCall(MatNullSpaceDestroy(&nullSpace));
1527: }
1528: }
1529: }
1530: PetscCall(PetscLogEventEnd(DM_CreateMatrix, 0, 0, 0, 0));
1531: PetscFunctionReturn(PETSC_SUCCESS);
1532: }
1534: /*@
1535: DMSetMatrixPreallocateSkip - When `DMCreateMatrix()` is called the matrix sizes and
1536: `ISLocalToGlobalMapping` will be properly set, but the data structures to store values in the
1537: matrices will not be preallocated.
1539: Logically Collective
1541: Input Parameters:
1542: + dm - the `DM`
1543: - skip - `PETSC_TRUE` to skip preallocation
1545: Level: developer
1547: Note:
1548: This is most useful to reduce initialization costs when `MatSetPreallocationCOO()` and
1549: `MatSetValuesCOO()` will be used.
1551: .seealso: [](ch_dmbase), `DM`, `DMCreateMatrix()`, `DMSetMatrixStructureOnly()`, `DMSetMatrixPreallocateOnly()`
1552: @*/
1553: PetscErrorCode DMSetMatrixPreallocateSkip(DM dm, PetscBool skip)
1554: {
1555: PetscFunctionBegin;
1557: dm->prealloc_skip = skip;
1558: PetscFunctionReturn(PETSC_SUCCESS);
1559: }
1561: /*@
1562: DMSetMatrixPreallocateOnly - When `DMCreateMatrix()` is called the matrix will be properly
1563: preallocated but the nonzero structure and zero values will not be set.
1565: Logically Collective
1567: Input Parameters:
1568: + dm - the `DM`
1569: - only - `PETSC_TRUE` if only want preallocation
1571: Options Database Key:
1572: . -dm_preallocate_only - Only preallocate the matrix for `DMCreateMatrix()`, `DMCreateMassMatrix()`, but do not fill it with zeros
1574: Level: developer
1576: .seealso: [](ch_dmbase), `DM`, `DMCreateMatrix()`, `DMCreateMassMatrix()`, `DMSetMatrixStructureOnly()`, `DMSetMatrixPreallocateSkip()`
1577: @*/
1578: PetscErrorCode DMSetMatrixPreallocateOnly(DM dm, PetscBool only)
1579: {
1580: PetscFunctionBegin;
1582: dm->prealloc_only = only;
1583: PetscFunctionReturn(PETSC_SUCCESS);
1584: }
1586: /*@
1587: DMSetMatrixStructureOnly - When `DMCreateMatrix()` is called, the matrix structure will be created
1588: but the array for numerical values will not be allocated.
1590: Logically Collective
1592: Input Parameters:
1593: + dm - the `DM`
1594: - only - `PETSC_TRUE` if you only want matrix structure
1596: Level: developer
1598: .seealso: [](ch_dmbase), `DM`, `DMCreateMatrix()`, `DMSetMatrixPreallocateOnly()`, `DMSetMatrixPreallocateSkip()`
1599: @*/
1600: PetscErrorCode DMSetMatrixStructureOnly(DM dm, PetscBool only)
1601: {
1602: PetscFunctionBegin;
1604: dm->structure_only = only;
1605: PetscFunctionReturn(PETSC_SUCCESS);
1606: }
1608: /*@
1609: DMSetBlockingType - set the blocking granularity to be used for variable block size `DMCreateMatrix()` is called
1611: Logically Collective
1613: Input Parameters:
1614: + dm - the `DM`
1615: - btype - block by topological point or field node
1617: Options Database Key:
1618: . -dm_blocking_type [topological_point, field_node] - use topological point blocking or field node blocking
1620: Level: advanced
1622: .seealso: [](ch_dmbase), `DM`, `DMCreateMatrix()`, `MatSetVariableBlockSizes()`
1623: @*/
1624: PetscErrorCode DMSetBlockingType(DM dm, DMBlockingType btype)
1625: {
1626: PetscFunctionBegin;
1628: dm->blocking_type = btype;
1629: PetscFunctionReturn(PETSC_SUCCESS);
1630: }
1632: /*@
1633: DMGetBlockingType - get the blocking granularity to be used for variable block size `DMCreateMatrix()` is called
1635: Not Collective
1637: Input Parameter:
1638: . dm - the `DM`
1640: Output Parameter:
1641: . btype - block by topological point or field node
1643: Level: advanced
1645: .seealso: [](ch_dmbase), `DM`, `DMCreateMatrix()`, `MatSetVariableBlockSizes()`
1646: @*/
1647: PetscErrorCode DMGetBlockingType(DM dm, DMBlockingType *btype)
1648: {
1649: PetscFunctionBegin;
1651: PetscAssertPointer(btype, 2);
1652: *btype = dm->blocking_type;
1653: PetscFunctionReturn(PETSC_SUCCESS);
1654: }
1656: /*@C
1657: DMGetWorkArray - Gets a work array guaranteed to be at least the input size, restore with `DMRestoreWorkArray()`
1659: Not Collective
1661: Input Parameters:
1662: + dm - the `DM` object
1663: . count - The minimum size
1664: - dtype - MPI data type, often `MPIU_REAL`, `MPIU_SCALAR`, or `MPIU_INT`)
1666: Output Parameter:
1667: . mem - the work array
1669: Level: developer
1671: Notes:
1672: A `DM` may stash the array between instantiations so using this routine may be more efficient than calling `PetscMalloc()`
1674: The array may contain nonzero values
1676: .seealso: [](ch_dmbase), `DM`, `DMDestroy()`, `DMCreate()`, `DMRestoreWorkArray()`, `PetscMalloc()`
1677: @*/
1678: PetscErrorCode DMGetWorkArray(DM dm, PetscInt count, MPI_Datatype dtype, void *mem)
1679: {
1680: DMWorkLink link;
1681: PetscMPIInt dsize;
1683: PetscFunctionBegin;
1685: PetscAssertPointer(mem, 4);
1686: if (!count) {
1687: *(void **)mem = NULL;
1688: PetscFunctionReturn(PETSC_SUCCESS);
1689: }
1690: if (dm->workin) {
1691: link = dm->workin;
1692: dm->workin = dm->workin->next;
1693: } else {
1694: PetscCall(PetscNew(&link));
1695: }
1696: /* Avoid MPI_Type_size for most used datatypes
1697: Get size directly */
1698: if (dtype == MPIU_INT) dsize = sizeof(PetscInt);
1699: else if (dtype == MPIU_REAL) dsize = sizeof(PetscReal);
1700: #if defined(PETSC_USE_64BIT_INDICES)
1701: else if (dtype == MPI_INT) dsize = sizeof(int);
1702: #endif
1703: #if defined(PETSC_USE_COMPLEX)
1704: else if (dtype == MPIU_SCALAR) dsize = sizeof(PetscScalar);
1705: #endif
1706: else PetscCallMPI(MPI_Type_size(dtype, &dsize));
1708: if (((size_t)dsize * count) > link->bytes) {
1709: PetscCall(PetscFree(link->mem));
1710: PetscCall(PetscMalloc(dsize * count, &link->mem));
1711: link->bytes = dsize * count;
1712: }
1713: link->next = dm->workout;
1714: dm->workout = link;
1715: *(void **)mem = link->mem;
1716: PetscFunctionReturn(PETSC_SUCCESS);
1717: }
1719: /*@C
1720: DMRestoreWorkArray - Restores a work array obtained with `DMCreateWorkArray()`
1722: Not Collective
1724: Input Parameters:
1725: + dm - the `DM` object
1726: . count - The minimum size
1727: - dtype - MPI data type, often `MPIU_REAL`, `MPIU_SCALAR`, `MPIU_INT`
1729: Output Parameter:
1730: . mem - the work array
1732: Level: developer
1734: Developer Note:
1735: count and dtype are ignored, they are only needed for `DMGetWorkArray()`
1737: .seealso: [](ch_dmbase), `DM`, `DMDestroy()`, `DMCreate()`, `DMGetWorkArray()`
1738: @*/
1739: PetscErrorCode DMRestoreWorkArray(DM dm, PetscInt count, MPI_Datatype dtype, void *mem)
1740: {
1741: DMWorkLink *p, link;
1743: PetscFunctionBegin;
1745: PetscAssertPointer(mem, 4);
1746: (void)count;
1747: (void)dtype;
1748: if (!*(void **)mem) PetscFunctionReturn(PETSC_SUCCESS);
1749: for (p = &dm->workout; (link = *p); p = &link->next) {
1750: if (link->mem == *(void **)mem) {
1751: *p = link->next;
1752: link->next = dm->workin;
1753: dm->workin = link;
1754: *(void **)mem = NULL;
1755: PetscFunctionReturn(PETSC_SUCCESS);
1756: }
1757: }
1758: SETERRQ(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONGSTATE, "Array was not checked out");
1759: }
1761: /*@C
1762: DMSetNullSpaceConstructor - Provide a callback function which constructs the nullspace for a given field, defined with `DMAddField()`, when function spaces
1763: are joined or split, such as in `DMCreateSubDM()`
1765: Logically Collective; No Fortran Support
1767: Input Parameters:
1768: + dm - The `DM`
1769: . field - The field number for the nullspace
1770: - nullsp - A callback to create the nullspace
1772: Calling sequence of `nullsp`:
1773: + dm - The present `DM`
1774: . origField - The field number given above, in the original `DM`
1775: . field - The field number in dm
1776: - nullSpace - The nullspace for the given field
1778: Level: intermediate
1780: .seealso: [](ch_dmbase), `DM`, `DMAddField()`, `DMGetNullSpaceConstructor()`, `DMSetNearNullSpaceConstructor()`, `DMGetNearNullSpaceConstructor()`, `DMCreateSubDM()`, `DMCreateSuperDM()`
1781: @*/
1782: PetscErrorCode DMSetNullSpaceConstructor(DM dm, PetscInt field, PetscErrorCode (*nullsp)(DM dm, PetscInt origField, PetscInt field, MatNullSpace *nullSpace))
1783: {
1784: PetscFunctionBegin;
1786: PetscCheck(field < 10, PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_OUTOFRANGE, "Cannot handle %" PetscInt_FMT " >= 10 fields", field);
1787: dm->nullspaceConstructors[field] = nullsp;
1788: PetscFunctionReturn(PETSC_SUCCESS);
1789: }
1791: /*@C
1792: DMGetNullSpaceConstructor - Return the callback function which constructs the nullspace for a given field, defined with `DMAddField()`
1794: Not Collective; No Fortran Support
1796: Input Parameters:
1797: + dm - The `DM`
1798: - field - The field number for the nullspace
1800: Output Parameter:
1801: . nullsp - A callback to create the nullspace
1803: Calling sequence of `nullsp`:
1804: + dm - The present DM
1805: . origField - The field number given above, in the original DM
1806: . field - The field number in dm
1807: - nullSpace - The nullspace for the given field
1809: Level: intermediate
1811: .seealso: [](ch_dmbase), `DM`, `DMAddField()`, `DMGetField()`, `DMSetNullSpaceConstructor()`, `DMSetNearNullSpaceConstructor()`, `DMGetNearNullSpaceConstructor()`, `DMCreateSubDM()`, `DMCreateSuperDM()`
1812: @*/
1813: PetscErrorCode DMGetNullSpaceConstructor(DM dm, PetscInt field, PetscErrorCode (**nullsp)(DM dm, PetscInt origField, PetscInt field, MatNullSpace *nullSpace))
1814: {
1815: PetscFunctionBegin;
1817: PetscAssertPointer(nullsp, 3);
1818: PetscCheck(field < 10, PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_OUTOFRANGE, "Cannot handle %" PetscInt_FMT " >= 10 fields", field);
1819: *nullsp = dm->nullspaceConstructors[field];
1820: PetscFunctionReturn(PETSC_SUCCESS);
1821: }
1823: /*@C
1824: DMSetNearNullSpaceConstructor - Provide a callback function which constructs the near-nullspace for a given field, defined with `DMAddField()`
1826: Logically Collective; No Fortran Support
1828: Input Parameters:
1829: + dm - The `DM`
1830: . field - The field number for the nullspace
1831: - nullsp - A callback to create the near-nullspace
1833: Calling sequence of `nullsp`:
1834: + dm - The present `DM`
1835: . origField - The field number given above, in the original `DM`
1836: . field - The field number in dm
1837: - nullSpace - The nullspace for the given field
1839: Level: intermediate
1841: .seealso: [](ch_dmbase), `DM`, `DMAddField()`, `DMGetNearNullSpaceConstructor()`, `DMSetNullSpaceConstructor()`, `DMGetNullSpaceConstructor()`, `DMCreateSubDM()`, `DMCreateSuperDM()`,
1842: `MatNullSpace`
1843: @*/
1844: PetscErrorCode DMSetNearNullSpaceConstructor(DM dm, PetscInt field, PetscErrorCode (*nullsp)(DM dm, PetscInt origField, PetscInt field, MatNullSpace *nullSpace))
1845: {
1846: PetscFunctionBegin;
1848: PetscCheck(field < 10, PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_OUTOFRANGE, "Cannot handle %" PetscInt_FMT " >= 10 fields", field);
1849: dm->nearnullspaceConstructors[field] = nullsp;
1850: PetscFunctionReturn(PETSC_SUCCESS);
1851: }
1853: /*@C
1854: DMGetNearNullSpaceConstructor - Return the callback function which constructs the near-nullspace for a given field, defined with `DMAddField()`
1856: Not Collective; No Fortran Support
1858: Input Parameters:
1859: + dm - The `DM`
1860: - field - The field number for the nullspace
1862: Output Parameter:
1863: . nullsp - A callback to create the near-nullspace
1865: Calling sequence of `nullsp`:
1866: + dm - The present `DM`
1867: . origField - The field number given above, in the original `DM`
1868: . field - The field number in dm
1869: - nullSpace - The nullspace for the given field
1871: Level: intermediate
1873: .seealso: [](ch_dmbase), `DM`, `DMAddField()`, `DMGetField()`, `DMSetNearNullSpaceConstructor()`, `DMSetNullSpaceConstructor()`, `DMGetNullSpaceConstructor()`, `DMCreateSubDM()`,
1874: `MatNullSpace`, `DMCreateSuperDM()`
1875: @*/
1876: PetscErrorCode DMGetNearNullSpaceConstructor(DM dm, PetscInt field, PetscErrorCode (**nullsp)(DM dm, PetscInt origField, PetscInt field, MatNullSpace *nullSpace))
1877: {
1878: PetscFunctionBegin;
1880: PetscAssertPointer(nullsp, 3);
1881: PetscCheck(field < 10, PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_OUTOFRANGE, "Cannot handle %" PetscInt_FMT " >= 10 fields", field);
1882: *nullsp = dm->nearnullspaceConstructors[field];
1883: PetscFunctionReturn(PETSC_SUCCESS);
1884: }
1886: /*@C
1887: DMCreateFieldIS - Creates a set of `IS` objects with the global indices of dofs for each field defined with `DMAddField()`
1889: Not Collective; No Fortran Support
1891: Input Parameter:
1892: . dm - the `DM` object
1894: Output Parameters:
1895: + numFields - The number of fields (or `NULL` if not requested)
1896: . fieldNames - The number of each field (or `NULL` if not requested)
1897: - fields - The global indices for each field (or `NULL` if not requested)
1899: Level: intermediate
1901: Note:
1902: The user is responsible for freeing all requested arrays. In particular, every entry of `fieldNames` should be freed with
1903: `PetscFree()`, every entry of `fields` should be destroyed with `ISDestroy()`, and both arrays should be freed with
1904: `PetscFree()`.
1906: Developer Note:
1907: It is not clear why both this function and `DMCreateFieldDecomposition()` exist. Having two seems redundant and confusing. This function should
1908: likely be removed.
1910: .seealso: [](ch_dmbase), `DM`, `DMAddField()`, `DMGetField()`, `DMDestroy()`, `DMView()`, `DMCreateInterpolation()`, `DMCreateColoring()`, `DMCreateMatrix()`,
1911: `DMCreateFieldDecomposition()`
1912: @*/
1913: PetscErrorCode DMCreateFieldIS(DM dm, PetscInt *numFields, char ***fieldNames, IS **fields)
1914: {
1915: PetscSection section, sectionGlobal;
1917: PetscFunctionBegin;
1919: if (numFields) {
1920: PetscAssertPointer(numFields, 2);
1921: *numFields = 0;
1922: }
1923: if (fieldNames) {
1924: PetscAssertPointer(fieldNames, 3);
1925: *fieldNames = NULL;
1926: }
1927: if (fields) {
1928: PetscAssertPointer(fields, 4);
1929: *fields = NULL;
1930: }
1931: PetscCall(DMGetLocalSection(dm, §ion));
1932: if (section) {
1933: PetscInt *fieldSizes, *fieldNc, **fieldIndices;
1934: PetscInt nF, f, pStart, pEnd, p;
1936: PetscCall(DMGetGlobalSection(dm, §ionGlobal));
1937: PetscCall(PetscSectionGetNumFields(section, &nF));
1938: PetscCall(PetscMalloc3(nF, &fieldSizes, nF, &fieldNc, nF, &fieldIndices));
1939: PetscCall(PetscSectionGetChart(sectionGlobal, &pStart, &pEnd));
1940: for (f = 0; f < nF; ++f) {
1941: fieldSizes[f] = 0;
1942: PetscCall(PetscSectionGetFieldComponents(section, f, &fieldNc[f]));
1943: }
1944: for (p = pStart; p < pEnd; ++p) {
1945: PetscInt gdof;
1947: PetscCall(PetscSectionGetDof(sectionGlobal, p, &gdof));
1948: if (gdof > 0) {
1949: for (f = 0; f < nF; ++f) {
1950: PetscInt fdof, fcdof, fpdof;
1952: PetscCall(PetscSectionGetFieldDof(section, p, f, &fdof));
1953: PetscCall(PetscSectionGetFieldConstraintDof(section, p, f, &fcdof));
1954: fpdof = fdof - fcdof;
1955: if (fpdof && fpdof != fieldNc[f]) {
1956: /* Layout does not admit a pointwise block size */
1957: fieldNc[f] = 1;
1958: }
1959: fieldSizes[f] += fpdof;
1960: }
1961: }
1962: }
1963: for (f = 0; f < nF; ++f) {
1964: PetscCall(PetscMalloc1(fieldSizes[f], &fieldIndices[f]));
1965: fieldSizes[f] = 0;
1966: }
1967: for (p = pStart; p < pEnd; ++p) {
1968: PetscInt gdof, goff;
1970: PetscCall(PetscSectionGetDof(sectionGlobal, p, &gdof));
1971: if (gdof > 0) {
1972: PetscCall(PetscSectionGetOffset(sectionGlobal, p, &goff));
1973: for (f = 0; f < nF; ++f) {
1974: PetscInt fdof, fcdof, fc;
1976: PetscCall(PetscSectionGetFieldDof(section, p, f, &fdof));
1977: PetscCall(PetscSectionGetFieldConstraintDof(section, p, f, &fcdof));
1978: for (fc = 0; fc < fdof - fcdof; ++fc, ++fieldSizes[f]) fieldIndices[f][fieldSizes[f]] = goff++;
1979: }
1980: }
1981: }
1982: if (numFields) *numFields = nF;
1983: if (fieldNames) {
1984: PetscCall(PetscMalloc1(nF, fieldNames));
1985: for (f = 0; f < nF; ++f) {
1986: const char *fieldName;
1988: PetscCall(PetscSectionGetFieldName(section, f, &fieldName));
1989: PetscCall(PetscStrallocpy(fieldName, &(*fieldNames)[f]));
1990: }
1991: }
1992: if (fields) {
1993: PetscCall(PetscMalloc1(nF, fields));
1994: for (f = 0; f < nF; ++f) {
1995: PetscInt bs, in[2], out[2];
1997: PetscCall(ISCreateGeneral(PetscObjectComm((PetscObject)dm), fieldSizes[f], fieldIndices[f], PETSC_OWN_POINTER, &(*fields)[f]));
1998: in[0] = -fieldNc[f];
1999: in[1] = fieldNc[f];
2000: PetscCallMPI(MPIU_Allreduce(in, out, 2, MPIU_INT, MPI_MAX, PetscObjectComm((PetscObject)dm)));
2001: bs = (-out[0] == out[1]) ? out[1] : 1;
2002: PetscCall(ISSetBlockSize((*fields)[f], bs));
2003: }
2004: }
2005: PetscCall(PetscFree3(fieldSizes, fieldNc, fieldIndices));
2006: } else PetscTryTypeMethod(dm, createfieldis, numFields, fieldNames, fields);
2007: PetscFunctionReturn(PETSC_SUCCESS);
2008: }
2010: /*@C
2011: DMCreateFieldDecomposition - Returns a list of `IS` objects defining a decomposition of a problem into subproblems
2012: corresponding to different fields.
2014: Not Collective; No Fortran Support
2016: Input Parameter:
2017: . dm - the `DM` object
2019: Output Parameters:
2020: + len - The number of fields (or `NULL` if not requested)
2021: . namelist - The name for each field (or `NULL` if not requested)
2022: . islist - The global indices for each field (or `NULL` if not requested)
2023: - dmlist - The `DM`s for each field subproblem (or `NULL`, if not requested; if `NULL` is returned, no `DM`s are defined)
2025: Level: intermediate
2027: Notes:
2028: Each `IS` contains the global indices of the dofs of the corresponding field, defined by
2029: `DMAddField()`. The optional list of `DM`s define the `DM` for each subproblem.
2031: The same as `DMCreateFieldIS()` but also returns a `DM` for each field.
2033: The user is responsible for freeing all requested arrays. In particular, every entry of `namelist` should be freed with
2034: `PetscFree()`, every entry of `islist` should be destroyed with `ISDestroy()`, every entry of `dmlist` should be destroyed with `DMDestroy()`,
2035: and all of the arrays should be freed with `PetscFree()`.
2037: Developer Notes:
2038: It is not clear why this function and `DMCreateFieldIS()` exist. Having two seems redundant and confusing.
2040: Unlike `DMRefine()`, `DMCoarsen()`, and `DMCreateDomainDecomposition()` this provides no mechanism to provide hooks that are called after the
2041: decomposition is computed.
2043: .seealso: [](ch_dmbase), `DM`, `DMAddField()`, `DMCreateFieldIS()`, `DMCreateSubDM()`, `DMCreateDomainDecomposition()`, `DMDestroy()`, `DMView()`, `DMCreateInterpolation()`, `DMCreateColoring()`, `DMCreateMatrix()`, `DMCreateMassMatrix()`, `DMRefine()`, `DMCoarsen()`
2044: @*/
2045: PetscErrorCode DMCreateFieldDecomposition(DM dm, PetscInt *len, char ***namelist, IS **islist, DM **dmlist)
2046: {
2047: PetscFunctionBegin;
2049: if (len) {
2050: PetscAssertPointer(len, 2);
2051: *len = 0;
2052: }
2053: if (namelist) {
2054: PetscAssertPointer(namelist, 3);
2055: *namelist = NULL;
2056: }
2057: if (islist) {
2058: PetscAssertPointer(islist, 4);
2059: *islist = NULL;
2060: }
2061: if (dmlist) {
2062: PetscAssertPointer(dmlist, 5);
2063: *dmlist = NULL;
2064: }
2065: /*
2066: Is it a good idea to apply the following check across all impls?
2067: Perhaps some impls can have a well-defined decomposition before DMSetUp?
2068: This, however, follows the general principle that accessors are not well-behaved until the object is set up.
2069: */
2070: PetscCheck(dm->setupcalled, PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_WRONGSTATE, "Decomposition defined only after DMSetUp");
2071: if (!dm->ops->createfielddecomposition) {
2072: PetscSection section;
2073: PetscInt numFields, f;
2075: PetscCall(DMGetLocalSection(dm, §ion));
2076: if (section) PetscCall(PetscSectionGetNumFields(section, &numFields));
2077: if (section && numFields && dm->ops->createsubdm) {
2078: if (len) *len = numFields;
2079: if (namelist) PetscCall(PetscMalloc1(numFields, namelist));
2080: if (islist) PetscCall(PetscMalloc1(numFields, islist));
2081: if (dmlist) PetscCall(PetscMalloc1(numFields, dmlist));
2082: for (f = 0; f < numFields; ++f) {
2083: const char *fieldName;
2085: PetscCall(DMCreateSubDM(dm, 1, &f, islist ? &(*islist)[f] : NULL, dmlist ? &(*dmlist)[f] : NULL));
2086: if (namelist) {
2087: PetscCall(PetscSectionGetFieldName(section, f, &fieldName));
2088: PetscCall(PetscStrallocpy(fieldName, &(*namelist)[f]));
2089: }
2090: }
2091: } else {
2092: PetscCall(DMCreateFieldIS(dm, len, namelist, islist));
2093: /* By default there are no DMs associated with subproblems. */
2094: if (dmlist) *dmlist = NULL;
2095: }
2096: } else PetscUseTypeMethod(dm, createfielddecomposition, len, namelist, islist, dmlist);
2097: PetscFunctionReturn(PETSC_SUCCESS);
2098: }
2100: /*@
2101: DMCreateSubDM - Returns an `IS` and `DM` encapsulating a subproblem defined by the fields passed in.
2102: The fields are defined by `DMCreateFieldIS()`.
2104: Not collective
2106: Input Parameters:
2107: + dm - The `DM` object
2108: . numFields - The number of fields to select
2109: - fields - The field numbers of the selected fields
2111: Output Parameters:
2112: + is - The global indices for all the degrees of freedom in the new sub `DM`, use `NULL` if not needed
2113: - subdm - The `DM` for the subproblem, use `NULL` if not needed
2115: Level: intermediate
2117: Note:
2118: You need to call `DMPlexSetMigrationSF()` on the original `DM` if you want the Global-To-Natural map to be automatically constructed
2120: .seealso: [](ch_dmbase), `DM`, `DMCreateFieldIS()`, `DMCreateFieldDecomposition()`, `DMAddField()`, `DMCreateSuperDM()`, `IS`, `DMPlexSetMigrationSF()`, `DMDestroy()`, `DMView()`, `DMCreateInterpolation()`, `DMCreateColoring()`, `DMCreateMatrix()`, `DMCreateMassMatrix()`
2121: @*/
2122: PetscErrorCode DMCreateSubDM(DM dm, PetscInt numFields, const PetscInt fields[], IS *is, DM *subdm)
2123: {
2124: PetscFunctionBegin;
2126: PetscAssertPointer(fields, 3);
2127: if (is) PetscAssertPointer(is, 4);
2128: if (subdm) PetscAssertPointer(subdm, 5);
2129: PetscUseTypeMethod(dm, createsubdm, numFields, fields, is, subdm);
2130: PetscFunctionReturn(PETSC_SUCCESS);
2131: }
2133: /*@C
2134: DMCreateSuperDM - Returns an arrays of `IS` and `DM` encapsulating a superproblem defined by multiple `DM`s passed in.
2136: Not collective
2138: Input Parameters:
2139: + dms - The `DM` objects
2140: - n - The number of `DM`s
2142: Output Parameters:
2143: + is - The global indices for each of subproblem within the super `DM`, or NULL
2144: - superdm - The `DM` for the superproblem
2146: Level: intermediate
2148: Note:
2149: You need to call `DMPlexSetMigrationSF()` on the original `DM` if you want the Global-To-Natural map to be automatically constructed
2151: .seealso: [](ch_dmbase), `DM`, `DMCreateSubDM()`, `DMPlexSetMigrationSF()`, `DMDestroy()`, `DMView()`, `DMCreateInterpolation()`, `DMCreateColoring()`, `DMCreateMatrix()`, `DMCreateMassMatrix()`, `DMCreateFieldIS()`, `DMCreateDomainDecomposition()`
2152: @*/
2153: PetscErrorCode DMCreateSuperDM(DM dms[], PetscInt n, IS *is[], DM *superdm)
2154: {
2155: PetscInt i;
2157: PetscFunctionBegin;
2158: PetscAssertPointer(dms, 1);
2160: if (is) PetscAssertPointer(is, 3);
2161: PetscAssertPointer(superdm, 4);
2162: PetscCheck(n >= 0, PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "Number of DMs must be nonnegative: %" PetscInt_FMT, n);
2163: if (n) {
2164: DM dm = dms[0];
2165: PetscCheck(dm->ops->createsuperdm, PetscObjectComm((PetscObject)dm), PETSC_ERR_SUP, "No method createsuperdm for DM of type %s", ((PetscObject)dm)->type_name);
2166: PetscCall((*dm->ops->createsuperdm)(dms, n, is, superdm));
2167: }
2168: PetscFunctionReturn(PETSC_SUCCESS);
2169: }
2171: /*@C
2172: DMCreateDomainDecomposition - Returns lists of `IS` objects defining a decomposition of a
2173: problem into subproblems corresponding to restrictions to pairs of nested subdomains.
2175: Not Collective
2177: Input Parameter:
2178: . dm - the `DM` object
2180: Output Parameters:
2181: + n - The number of subproblems in the domain decomposition (or `NULL` if not requested)
2182: . namelist - The name for each subdomain (or `NULL` if not requested)
2183: . innerislist - The global indices for each inner subdomain (or `NULL`, if not requested)
2184: . outerislist - The global indices for each outer subdomain (or `NULL`, if not requested)
2185: - dmlist - The `DM`s for each subdomain subproblem (or `NULL`, if not requested; if `NULL` is returned, no `DM`s are defined)
2187: Level: intermediate
2189: Notes:
2190: Each `IS` contains the global indices of the dofs of the corresponding subdomains with in the
2191: dofs of the original `DM`. The inner subdomains conceptually define a nonoverlapping
2192: covering, while outer subdomains can overlap.
2194: The optional list of `DM`s define a `DM` for each subproblem.
2196: The user is responsible for freeing all requested arrays. In particular, every entry of `namelist` should be freed with
2197: `PetscFree()`, every entry of `innerislist` and `outerislist` should be destroyed with `ISDestroy()`, every entry of `dmlist` should be destroyed with `DMDestroy()`,
2198: and all of the arrays should be freed with `PetscFree()`.
2200: Developer Notes:
2201: The `dmlist` is for the inner subdomains or the outer subdomains or all subdomains?
2203: The names are inconsistent, the hooks use `DMSubDomainHook` which is nothing like `DMCreateDomainDecomposition()` while `DMRefineHook` is used for `DMRefine()`.
2205: .seealso: [](ch_dmbase), `DM`, `DMCreateFieldDecomposition()`, `DMDestroy()`, `DMCreateDomainDecompositionScatters()`, `DMView()`, `DMCreateInterpolation()`,
2206: `DMSubDomainHookAdd()`, `DMSubDomainHookRemove()`,`DMCreateColoring()`, `DMCreateMatrix()`, `DMCreateMassMatrix()`, `DMRefine()`, `DMCoarsen()`
2207: @*/
2208: PetscErrorCode DMCreateDomainDecomposition(DM dm, PetscInt *n, char ***namelist, IS **innerislist, IS **outerislist, DM **dmlist)
2209: {
2210: DMSubDomainHookLink link;
2211: PetscInt i, l;
2213: PetscFunctionBegin;
2215: if (n) {
2216: PetscAssertPointer(n, 2);
2217: *n = 0;
2218: }
2219: if (namelist) {
2220: PetscAssertPointer(namelist, 3);
2221: *namelist = NULL;
2222: }
2223: if (innerislist) {
2224: PetscAssertPointer(innerislist, 4);
2225: *innerislist = NULL;
2226: }
2227: if (outerislist) {
2228: PetscAssertPointer(outerislist, 5);
2229: *outerislist = NULL;
2230: }
2231: if (dmlist) {
2232: PetscAssertPointer(dmlist, 6);
2233: *dmlist = NULL;
2234: }
2235: /*
2236: Is it a good idea to apply the following check across all impls?
2237: Perhaps some impls can have a well-defined decomposition before DMSetUp?
2238: This, however, follows the general principle that accessors are not well-behaved until the object is set up.
2239: */
2240: PetscCheck(dm->setupcalled, PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_WRONGSTATE, "Decomposition defined only after DMSetUp");
2241: if (dm->ops->createdomaindecomposition) {
2242: PetscUseTypeMethod(dm, createdomaindecomposition, &l, namelist, innerislist, outerislist, dmlist);
2243: /* copy subdomain hooks and context over to the subdomain DMs */
2244: if (dmlist && *dmlist) {
2245: for (i = 0; i < l; i++) {
2246: for (link = dm->subdomainhook; link; link = link->next) {
2247: if (link->ddhook) PetscCall((*link->ddhook)(dm, (*dmlist)[i], link->ctx));
2248: }
2249: if (dm->ctx) (*dmlist)[i]->ctx = dm->ctx;
2250: }
2251: }
2252: if (n) *n = l;
2253: }
2254: PetscFunctionReturn(PETSC_SUCCESS);
2255: }
2257: /*@C
2258: DMCreateDomainDecompositionScatters - Returns scatters to the subdomain vectors from the global vector for subdomains created with
2259: `DMCreateDomainDecomposition()`
2261: Not Collective
2263: Input Parameters:
2264: + dm - the `DM` object
2265: . n - the number of subdomains
2266: - subdms - the local subdomains
2268: Output Parameters:
2269: + iscat - scatter from global vector to nonoverlapping global vector entries on subdomain
2270: . oscat - scatter from global vector to overlapping global vector entries on subdomain
2271: - gscat - scatter from global vector to local vector on subdomain (fills in ghosts)
2273: Level: developer
2275: Note:
2276: This is an alternative to the iis and ois arguments in `DMCreateDomainDecomposition()` that allow for the solution
2277: of general nonlinear problems with overlapping subdomain methods. While merely having index sets that enable subsets
2278: of the residual equations to be created is fine for linear problems, nonlinear problems require local assembly of
2279: solution and residual data.
2281: Developer Note:
2282: Can the subdms input be anything or are they exactly the `DM` obtained from
2283: `DMCreateDomainDecomposition()`?
2285: .seealso: [](ch_dmbase), `DM`, `DMCreateDomainDecomposition()`, `DMDestroy()`, `DMView()`, `DMCreateInterpolation()`, `DMCreateColoring()`, `DMCreateMatrix()`, `DMCreateMassMatrix()`, `DMCreateFieldIS()`
2286: @*/
2287: PetscErrorCode DMCreateDomainDecompositionScatters(DM dm, PetscInt n, DM *subdms, VecScatter *iscat[], VecScatter *oscat[], VecScatter *gscat[])
2288: {
2289: PetscFunctionBegin;
2291: PetscAssertPointer(subdms, 3);
2292: PetscUseTypeMethod(dm, createddscatters, n, subdms, iscat, oscat, gscat);
2293: PetscFunctionReturn(PETSC_SUCCESS);
2294: }
2296: /*@
2297: DMRefine - Refines a `DM` object using a standard nonadaptive refinement of the underlying mesh
2299: Collective
2301: Input Parameters:
2302: + dm - the `DM` object
2303: - comm - the communicator to contain the new `DM` object (or `MPI_COMM_NULL`)
2305: Output Parameter:
2306: . dmf - the refined `DM`, or `NULL`
2308: Options Database Key:
2309: . -dm_plex_cell_refiner <strategy> - chooses the refinement strategy, e.g. regular, tohex
2311: Level: developer
2313: Note:
2314: If no refinement was done, the return value is `NULL`
2316: .seealso: [](ch_dmbase), `DM`, `DMCoarsen()`, `DMDestroy()`, `DMView()`, `DMCreateGlobalVector()`, `DMCreateInterpolation()`, `DMCreateDomainDecomposition()`,
2317: `DMRefineHookAdd()`, `DMRefineHookRemove()`
2318: @*/
2319: PetscErrorCode DMRefine(DM dm, MPI_Comm comm, DM *dmf)
2320: {
2321: DMRefineHookLink link;
2323: PetscFunctionBegin;
2325: PetscCall(PetscLogEventBegin(DM_Refine, dm, 0, 0, 0));
2326: PetscUseTypeMethod(dm, refine, comm, dmf);
2327: if (*dmf) {
2328: (*dmf)->ops->creatematrix = dm->ops->creatematrix;
2330: PetscCall(PetscObjectCopyFortranFunctionPointers((PetscObject)dm, (PetscObject)*dmf));
2332: (*dmf)->ctx = dm->ctx;
2333: (*dmf)->leveldown = dm->leveldown;
2334: (*dmf)->levelup = dm->levelup + 1;
2336: PetscCall(DMSetMatType(*dmf, dm->mattype));
2337: for (link = dm->refinehook; link; link = link->next) {
2338: if (link->refinehook) PetscCall((*link->refinehook)(dm, *dmf, link->ctx));
2339: }
2340: }
2341: PetscCall(PetscLogEventEnd(DM_Refine, dm, 0, 0, 0));
2342: PetscFunctionReturn(PETSC_SUCCESS);
2343: }
2345: /*@C
2346: DMRefineHookAdd - adds a callback to be run when interpolating a nonlinear problem to a finer grid
2348: Logically Collective; No Fortran Support
2350: Input Parameters:
2351: + coarse - `DM` on which to run a hook when interpolating to a finer level
2352: . refinehook - function to run when setting up the finer level
2353: . interphook - function to run to update data on finer levels (once per `SNESSolve()`)
2354: - ctx - [optional] user-defined context for provide data for the hooks (may be `NULL`)
2356: Calling sequence of `refinehook`:
2357: + coarse - coarse level `DM`
2358: . fine - fine level `DM` to interpolate problem to
2359: - ctx - optional user-defined function context
2361: Calling sequence of `interphook`:
2362: + coarse - coarse level `DM`
2363: . interp - matrix interpolating a coarse-level solution to the finer grid
2364: . fine - fine level `DM` to update
2365: - ctx - optional user-defined function context
2367: Level: advanced
2369: Notes:
2370: This function is only needed if auxiliary data that is attached to the `DM`s via, for example, `PetscObjectCompose()`, needs to be
2371: passed to fine grids while grid sequencing.
2373: The actual interpolation is done when `DMInterpolate()` is called.
2375: If this function is called multiple times, the hooks will be run in the order they are added.
2377: .seealso: [](ch_dmbase), `DM`, `DMCoarsenHookAdd()`, `DMInterpolate()`, `SNESFASGetInterpolation()`, `SNESFASGetInjection()`, `PetscObjectCompose()`, `PetscContainerCreate()`
2378: @*/
2379: PetscErrorCode DMRefineHookAdd(DM coarse, PetscErrorCode (*refinehook)(DM coarse, DM fine, void *ctx), PetscErrorCode (*interphook)(DM coarse, Mat interp, DM fine, void *ctx), void *ctx)
2380: {
2381: DMRefineHookLink link, *p;
2383: PetscFunctionBegin;
2385: for (p = &coarse->refinehook; *p; p = &(*p)->next) { /* Scan to the end of the current list of hooks */
2386: if ((*p)->refinehook == refinehook && (*p)->interphook == interphook && (*p)->ctx == ctx) PetscFunctionReturn(PETSC_SUCCESS);
2387: }
2388: PetscCall(PetscNew(&link));
2389: link->refinehook = refinehook;
2390: link->interphook = interphook;
2391: link->ctx = ctx;
2392: link->next = NULL;
2393: *p = link;
2394: PetscFunctionReturn(PETSC_SUCCESS);
2395: }
2397: /*@C
2398: DMRefineHookRemove - remove a callback from the list of hooks, that have been set with `DMRefineHookAdd()`, to be run when interpolating
2399: a nonlinear problem to a finer grid
2401: Logically Collective; No Fortran Support
2403: Input Parameters:
2404: + coarse - the `DM` on which to run a hook when restricting to a coarser level
2405: . refinehook - function to run when setting up a finer level
2406: . interphook - function to run to update data on finer levels
2407: - ctx - [optional] user-defined context for provide data for the hooks (may be `NULL`)
2409: Level: advanced
2411: Note:
2412: This function does nothing if the hook is not in the list.
2414: .seealso: [](ch_dmbase), `DM`, `DMRefineHookAdd()`, `DMCoarsenHookRemove()`, `DMInterpolate()`, `SNESFASGetInterpolation()`, `SNESFASGetInjection()`, `PetscObjectCompose()`, `PetscContainerCreate()`
2415: @*/
2416: PetscErrorCode DMRefineHookRemove(DM coarse, PetscErrorCode (*refinehook)(DM, DM, void *), PetscErrorCode (*interphook)(DM, Mat, DM, void *), void *ctx)
2417: {
2418: DMRefineHookLink link, *p;
2420: PetscFunctionBegin;
2422: for (p = &coarse->refinehook; *p; p = &(*p)->next) { /* Search the list of current hooks */
2423: if ((*p)->refinehook == refinehook && (*p)->interphook == interphook && (*p)->ctx == ctx) {
2424: link = *p;
2425: *p = link->next;
2426: PetscCall(PetscFree(link));
2427: break;
2428: }
2429: }
2430: PetscFunctionReturn(PETSC_SUCCESS);
2431: }
2433: /*@
2434: DMInterpolate - interpolates user-defined problem data attached to a `DM` to a finer `DM` by running hooks registered by `DMRefineHookAdd()`
2436: Collective if any hooks are
2438: Input Parameters:
2439: + coarse - coarser `DM` to use as a base
2440: . interp - interpolation matrix, apply using `MatInterpolate()`
2441: - fine - finer `DM` to update
2443: Level: developer
2445: Developer Note:
2446: This routine is called `DMInterpolate()` while the hook is called `DMRefineHookAdd()`. It would be better to have an
2447: an API with consistent terminology.
2449: .seealso: [](ch_dmbase), `DM`, `DMRefineHookAdd()`, `MatInterpolate()`
2450: @*/
2451: PetscErrorCode DMInterpolate(DM coarse, Mat interp, DM fine)
2452: {
2453: DMRefineHookLink link;
2455: PetscFunctionBegin;
2456: for (link = fine->refinehook; link; link = link->next) {
2457: if (link->interphook) PetscCall((*link->interphook)(coarse, interp, fine, link->ctx));
2458: }
2459: PetscFunctionReturn(PETSC_SUCCESS);
2460: }
2462: /*@
2463: DMInterpolateSolution - Interpolates a solution from a coarse mesh to a fine mesh.
2465: Collective
2467: Input Parameters:
2468: + coarse - coarse `DM`
2469: . fine - fine `DM`
2470: . interp - (optional) the matrix computed by `DMCreateInterpolation()`. Implementations may not need this, but if it
2471: is available it can avoid some recomputation. If it is provided, `MatInterpolate()` will be used if
2472: the coarse `DM` does not have a specialized implementation.
2473: - coarseSol - solution on the coarse mesh
2475: Output Parameter:
2476: . fineSol - the interpolation of coarseSol to the fine mesh
2478: Level: developer
2480: Note:
2481: This function exists because the interpolation of a solution vector between meshes is not always a linear
2482: map. For example, if a boundary value problem has an inhomogeneous Dirichlet boundary condition that is compressed
2483: out of the solution vector. Or if interpolation is inherently a nonlinear operation, such as a method using
2484: slope-limiting reconstruction.
2486: Developer Note:
2487: This doesn't just interpolate "solutions" so its API name is questionable.
2489: .seealso: [](ch_dmbase), `DM`, `DMInterpolate()`, `DMCreateInterpolation()`
2490: @*/
2491: PetscErrorCode DMInterpolateSolution(DM coarse, DM fine, Mat interp, Vec coarseSol, Vec fineSol)
2492: {
2493: PetscErrorCode (*interpsol)(DM, DM, Mat, Vec, Vec) = NULL;
2495: PetscFunctionBegin;
2501: PetscCall(PetscObjectQueryFunction((PetscObject)coarse, "DMInterpolateSolution_C", &interpsol));
2502: if (interpsol) {
2503: PetscCall((*interpsol)(coarse, fine, interp, coarseSol, fineSol));
2504: } else if (interp) {
2505: PetscCall(MatInterpolate(interp, coarseSol, fineSol));
2506: } else SETERRQ(PetscObjectComm((PetscObject)coarse), PETSC_ERR_SUP, "DM %s does not implement DMInterpolateSolution()", ((PetscObject)coarse)->type_name);
2507: PetscFunctionReturn(PETSC_SUCCESS);
2508: }
2510: /*@
2511: DMGetRefineLevel - Gets the number of refinements that have generated this `DM` from some initial `DM`.
2513: Not Collective
2515: Input Parameter:
2516: . dm - the `DM` object
2518: Output Parameter:
2519: . level - number of refinements
2521: Level: developer
2523: Note:
2524: This can be used, by example, to set the number of coarser levels associated with this `DM` for a multigrid solver.
2526: .seealso: [](ch_dmbase), `DM`, `DMRefine()`, `DMCoarsen()`, `DMGetCoarsenLevel()`, `DMDestroy()`, `DMView()`, `DMCreateGlobalVector()`, `DMCreateInterpolation()`
2527: @*/
2528: PetscErrorCode DMGetRefineLevel(DM dm, PetscInt *level)
2529: {
2530: PetscFunctionBegin;
2532: *level = dm->levelup;
2533: PetscFunctionReturn(PETSC_SUCCESS);
2534: }
2536: /*@
2537: DMSetRefineLevel - Sets the number of refinements that have generated this `DM`.
2539: Not Collective
2541: Input Parameters:
2542: + dm - the `DM` object
2543: - level - number of refinements
2545: Level: advanced
2547: Notes:
2548: This value is used by `PCMG` to determine how many multigrid levels to use
2550: The values are usually set automatically by the process that is causing the refinements of an initial `DM` by calling this routine.
2552: .seealso: [](ch_dmbase), `DM`, `DMGetRefineLevel()`, `DMCoarsen()`, `DMGetCoarsenLevel()`, `DMDestroy()`, `DMView()`, `DMCreateGlobalVector()`, `DMCreateInterpolation()`
2553: @*/
2554: PetscErrorCode DMSetRefineLevel(DM dm, PetscInt level)
2555: {
2556: PetscFunctionBegin;
2558: dm->levelup = level;
2559: PetscFunctionReturn(PETSC_SUCCESS);
2560: }
2562: /*@
2563: DMExtrude - Extrude a `DM` object from a surface
2565: Collective
2567: Input Parameters:
2568: + dm - the `DM` object
2569: - layers - the number of extruded cell layers
2571: Output Parameter:
2572: . dme - the extruded `DM`, or `NULL`
2574: Level: developer
2576: Note:
2577: If no extrusion was done, the return value is `NULL`
2579: .seealso: [](ch_dmbase), `DM`, `DMRefine()`, `DMCoarsen()`, `DMDestroy()`, `DMView()`, `DMCreateGlobalVector()`
2580: @*/
2581: PetscErrorCode DMExtrude(DM dm, PetscInt layers, DM *dme)
2582: {
2583: PetscFunctionBegin;
2585: PetscUseTypeMethod(dm, extrude, layers, dme);
2586: if (*dme) {
2587: (*dme)->ops->creatematrix = dm->ops->creatematrix;
2588: PetscCall(PetscObjectCopyFortranFunctionPointers((PetscObject)dm, (PetscObject)*dme));
2589: (*dme)->ctx = dm->ctx;
2590: PetscCall(DMSetMatType(*dme, dm->mattype));
2591: }
2592: PetscFunctionReturn(PETSC_SUCCESS);
2593: }
2595: PetscErrorCode DMGetBasisTransformDM_Internal(DM dm, DM *tdm)
2596: {
2597: PetscFunctionBegin;
2599: PetscAssertPointer(tdm, 2);
2600: *tdm = dm->transformDM;
2601: PetscFunctionReturn(PETSC_SUCCESS);
2602: }
2604: PetscErrorCode DMGetBasisTransformVec_Internal(DM dm, Vec *tv)
2605: {
2606: PetscFunctionBegin;
2608: PetscAssertPointer(tv, 2);
2609: *tv = dm->transform;
2610: PetscFunctionReturn(PETSC_SUCCESS);
2611: }
2613: /*@
2614: DMHasBasisTransform - Whether the `DM` employs a basis transformation from functions in global vectors to functions in local vectors
2616: Input Parameter:
2617: . dm - The `DM`
2619: Output Parameter:
2620: . flg - `PETSC_TRUE` if a basis transformation should be done
2622: Level: developer
2624: .seealso: [](ch_dmbase), `DM`, `DMPlexGlobalToLocalBasis()`, `DMPlexLocalToGlobalBasis()`, `DMPlexCreateBasisRotation()`
2625: @*/
2626: PetscErrorCode DMHasBasisTransform(DM dm, PetscBool *flg)
2627: {
2628: Vec tv;
2630: PetscFunctionBegin;
2632: PetscAssertPointer(flg, 2);
2633: PetscCall(DMGetBasisTransformVec_Internal(dm, &tv));
2634: *flg = tv ? PETSC_TRUE : PETSC_FALSE;
2635: PetscFunctionReturn(PETSC_SUCCESS);
2636: }
2638: PetscErrorCode DMConstructBasisTransform_Internal(DM dm)
2639: {
2640: PetscSection s, ts;
2641: PetscScalar *ta;
2642: PetscInt cdim, pStart, pEnd, p, Nf, f, Nc, dof;
2644: PetscFunctionBegin;
2645: PetscCall(DMGetCoordinateDim(dm, &cdim));
2646: PetscCall(DMGetLocalSection(dm, &s));
2647: PetscCall(PetscSectionGetChart(s, &pStart, &pEnd));
2648: PetscCall(PetscSectionGetNumFields(s, &Nf));
2649: PetscCall(DMClone(dm, &dm->transformDM));
2650: PetscCall(DMGetLocalSection(dm->transformDM, &ts));
2651: PetscCall(PetscSectionSetNumFields(ts, Nf));
2652: PetscCall(PetscSectionSetChart(ts, pStart, pEnd));
2653: for (f = 0; f < Nf; ++f) {
2654: PetscCall(PetscSectionGetFieldComponents(s, f, &Nc));
2655: /* We could start to label fields by their transformation properties */
2656: if (Nc != cdim) continue;
2657: for (p = pStart; p < pEnd; ++p) {
2658: PetscCall(PetscSectionGetFieldDof(s, p, f, &dof));
2659: if (!dof) continue;
2660: PetscCall(PetscSectionSetFieldDof(ts, p, f, PetscSqr(cdim)));
2661: PetscCall(PetscSectionAddDof(ts, p, PetscSqr(cdim)));
2662: }
2663: }
2664: PetscCall(PetscSectionSetUp(ts));
2665: PetscCall(DMCreateLocalVector(dm->transformDM, &dm->transform));
2666: PetscCall(VecGetArray(dm->transform, &ta));
2667: for (p = pStart; p < pEnd; ++p) {
2668: for (f = 0; f < Nf; ++f) {
2669: PetscCall(PetscSectionGetFieldDof(ts, p, f, &dof));
2670: if (dof) {
2671: PetscReal x[3] = {0.0, 0.0, 0.0};
2672: PetscScalar *tva;
2673: const PetscScalar *A;
2675: /* TODO Get quadrature point for this dual basis vector for coordinate */
2676: PetscCall((*dm->transformGetMatrix)(dm, x, PETSC_TRUE, &A, dm->transformCtx));
2677: PetscCall(DMPlexPointLocalFieldRef(dm->transformDM, p, f, ta, (void *)&tva));
2678: PetscCall(PetscArraycpy(tva, A, PetscSqr(cdim)));
2679: }
2680: }
2681: }
2682: PetscCall(VecRestoreArray(dm->transform, &ta));
2683: PetscFunctionReturn(PETSC_SUCCESS);
2684: }
2686: PetscErrorCode DMCopyTransform(DM dm, DM newdm)
2687: {
2688: PetscFunctionBegin;
2691: newdm->transformCtx = dm->transformCtx;
2692: newdm->transformSetUp = dm->transformSetUp;
2693: newdm->transformDestroy = NULL;
2694: newdm->transformGetMatrix = dm->transformGetMatrix;
2695: if (newdm->transformSetUp) PetscCall(DMConstructBasisTransform_Internal(newdm));
2696: PetscFunctionReturn(PETSC_SUCCESS);
2697: }
2699: /*@C
2700: DMGlobalToLocalHookAdd - adds a callback to be run when `DMGlobalToLocal()` is called
2702: Logically Collective
2704: Input Parameters:
2705: + dm - the `DM`
2706: . beginhook - function to run at the beginning of `DMGlobalToLocalBegin()`
2707: . endhook - function to run after `DMGlobalToLocalEnd()` has completed
2708: - ctx - [optional] user-defined context for provide data for the hooks (may be `NULL`)
2710: Calling sequence of `beginhook`:
2711: + dm - global `DM`
2712: . g - global vector
2713: . mode - mode
2714: . l - local vector
2715: - ctx - optional user-defined function context
2717: Calling sequence of `endhook`:
2718: + dm - global `DM`
2719: . g - global vector
2720: . mode - mode
2721: . l - local vector
2722: - ctx - optional user-defined function context
2724: Level: advanced
2726: Note:
2727: The hook may be used to provide, for example, values that represent boundary conditions in the local vectors that do not exist on the global vector.
2729: .seealso: [](ch_dmbase), `DM`, `DMGlobalToLocal()`, `DMRefineHookAdd()`, `SNESFASGetInterpolation()`, `SNESFASGetInjection()`, `PetscObjectCompose()`, `PetscContainerCreate()`
2730: @*/
2731: PetscErrorCode DMGlobalToLocalHookAdd(DM dm, PetscErrorCode (*beginhook)(DM dm, Vec g, InsertMode mode, Vec l, void *ctx), PetscErrorCode (*endhook)(DM dm, Vec g, InsertMode mode, Vec l, void *ctx), void *ctx)
2732: {
2733: DMGlobalToLocalHookLink link, *p;
2735: PetscFunctionBegin;
2737: for (p = &dm->gtolhook; *p; p = &(*p)->next) { } /* Scan to the end of the current list of hooks */
2738: PetscCall(PetscNew(&link));
2739: link->beginhook = beginhook;
2740: link->endhook = endhook;
2741: link->ctx = ctx;
2742: link->next = NULL;
2743: *p = link;
2744: PetscFunctionReturn(PETSC_SUCCESS);
2745: }
2747: static PetscErrorCode DMGlobalToLocalHook_Constraints(DM dm, Vec g, InsertMode mode, Vec l, void *ctx)
2748: {
2749: Mat cMat;
2750: Vec cVec, cBias;
2751: PetscSection section, cSec;
2752: PetscInt pStart, pEnd, p, dof;
2754: PetscFunctionBegin;
2755: (void)g;
2756: (void)ctx;
2758: PetscCall(DMGetDefaultConstraints(dm, &cSec, &cMat, &cBias));
2759: if (cMat && (mode == INSERT_VALUES || mode == INSERT_ALL_VALUES || mode == INSERT_BC_VALUES)) {
2760: PetscInt nRows;
2762: PetscCall(MatGetSize(cMat, &nRows, NULL));
2763: if (nRows <= 0) PetscFunctionReturn(PETSC_SUCCESS);
2764: PetscCall(DMGetLocalSection(dm, §ion));
2765: PetscCall(MatCreateVecs(cMat, NULL, &cVec));
2766: PetscCall(MatMult(cMat, l, cVec));
2767: if (cBias) PetscCall(VecAXPY(cVec, 1., cBias));
2768: PetscCall(PetscSectionGetChart(cSec, &pStart, &pEnd));
2769: for (p = pStart; p < pEnd; p++) {
2770: PetscCall(PetscSectionGetDof(cSec, p, &dof));
2771: if (dof) {
2772: PetscScalar *vals;
2773: PetscCall(VecGetValuesSection(cVec, cSec, p, &vals));
2774: PetscCall(VecSetValuesSection(l, section, p, vals, INSERT_ALL_VALUES));
2775: }
2776: }
2777: PetscCall(VecDestroy(&cVec));
2778: }
2779: PetscFunctionReturn(PETSC_SUCCESS);
2780: }
2782: /*@
2783: DMGlobalToLocal - update local vectors from global vector
2785: Neighbor-wise Collective
2787: Input Parameters:
2788: + dm - the `DM` object
2789: . g - the global vector
2790: . mode - `INSERT_VALUES` or `ADD_VALUES`
2791: - l - the local vector
2793: Level: beginner
2795: Notes:
2796: The communication involved in this update can be overlapped with computation by instead using
2797: `DMGlobalToLocalBegin()` and `DMGlobalToLocalEnd()`.
2799: `DMGlobalToLocalHookAdd()` may be used to provide additional operations that are performed during the update process.
2801: .seealso: [](ch_dmbase), `DM`, `DMGlobalToLocalHookAdd()`, `DMCoarsen()`, `DMDestroy()`, `DMView()`, `DMCreateGlobalVector()`, `DMCreateInterpolation()`,
2802: `DMGlobalToLocalEnd()`, `DMLocalToGlobalBegin()`, `DMLocalToGlobal()`, `DMLocalToGlobalEnd()`,
2803: `DMGlobalToLocalBegin()` `DMGlobalToLocalEnd()`
2804: @*/
2805: PetscErrorCode DMGlobalToLocal(DM dm, Vec g, InsertMode mode, Vec l)
2806: {
2807: PetscFunctionBegin;
2808: PetscCall(DMGlobalToLocalBegin(dm, g, mode, l));
2809: PetscCall(DMGlobalToLocalEnd(dm, g, mode, l));
2810: PetscFunctionReturn(PETSC_SUCCESS);
2811: }
2813: /*@
2814: DMGlobalToLocalBegin - Begins updating local vectors from global vector
2816: Neighbor-wise Collective
2818: Input Parameters:
2819: + dm - the `DM` object
2820: . g - the global vector
2821: . mode - `INSERT_VALUES` or `ADD_VALUES`
2822: - l - the local vector
2824: Level: intermediate
2826: Notes:
2827: The operation is completed with `DMGlobalToLocalEnd()`
2829: One can perform local computations between the `DMGlobalToLocalBegin()` and `DMGlobalToLocalEnd()` to overlap communication and computation
2831: `DMGlobalToLocal()` is a short form of `DMGlobalToLocalBegin()` and `DMGlobalToLocalEnd()`
2833: `DMGlobalToLocalHookAdd()` may be used to provide additional operations that are performed during the update process.
2835: .seealso: [](ch_dmbase), `DM`, `DMCoarsen()`, `DMDestroy()`, `DMView()`, `DMCreateGlobalVector()`, `DMCreateInterpolation()`, `DMGlobalToLocal()`, `DMGlobalToLocalEnd()`, `DMLocalToGlobalBegin()`, `DMLocalToGlobal()`, `DMLocalToGlobalEnd()`
2836: @*/
2837: PetscErrorCode DMGlobalToLocalBegin(DM dm, Vec g, InsertMode mode, Vec l)
2838: {
2839: PetscSF sf;
2840: DMGlobalToLocalHookLink link;
2842: PetscFunctionBegin;
2844: for (link = dm->gtolhook; link; link = link->next) {
2845: if (link->beginhook) PetscCall((*link->beginhook)(dm, g, mode, l, link->ctx));
2846: }
2847: PetscCall(DMGetSectionSF(dm, &sf));
2848: if (sf) {
2849: const PetscScalar *gArray;
2850: PetscScalar *lArray;
2851: PetscMemType lmtype, gmtype;
2853: PetscCheck(mode != ADD_VALUES, PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_OUTOFRANGE, "Invalid insertion mode %d", (int)mode);
2854: PetscCall(VecGetArrayAndMemType(l, &lArray, &lmtype));
2855: PetscCall(VecGetArrayReadAndMemType(g, &gArray, &gmtype));
2856: PetscCall(PetscSFBcastWithMemTypeBegin(sf, MPIU_SCALAR, gmtype, gArray, lmtype, lArray, MPI_REPLACE));
2857: PetscCall(VecRestoreArrayAndMemType(l, &lArray));
2858: PetscCall(VecRestoreArrayReadAndMemType(g, &gArray));
2859: } else {
2860: PetscUseTypeMethod(dm, globaltolocalbegin, g, mode == INSERT_ALL_VALUES ? INSERT_VALUES : (mode == ADD_ALL_VALUES ? ADD_VALUES : mode), l);
2861: }
2862: PetscFunctionReturn(PETSC_SUCCESS);
2863: }
2865: /*@
2866: DMGlobalToLocalEnd - Ends updating local vectors from global vector
2868: Neighbor-wise Collective
2870: Input Parameters:
2871: + dm - the `DM` object
2872: . g - the global vector
2873: . mode - `INSERT_VALUES` or `ADD_VALUES`
2874: - l - the local vector
2876: Level: intermediate
2878: Note:
2879: See `DMGlobalToLocalBegin()` for details.
2881: .seealso: [](ch_dmbase), `DM`, `DMCoarsen()`, `DMDestroy()`, `DMView()`, `DMCreateGlobalVector()`, `DMCreateInterpolation()`, `DMGlobalToLocal()`, `DMLocalToGlobalBegin()`, `DMLocalToGlobal()`, `DMLocalToGlobalEnd()`
2882: @*/
2883: PetscErrorCode DMGlobalToLocalEnd(DM dm, Vec g, InsertMode mode, Vec l)
2884: {
2885: PetscSF sf;
2886: const PetscScalar *gArray;
2887: PetscScalar *lArray;
2888: PetscBool transform;
2889: DMGlobalToLocalHookLink link;
2890: PetscMemType lmtype, gmtype;
2892: PetscFunctionBegin;
2894: PetscCall(DMGetSectionSF(dm, &sf));
2895: PetscCall(DMHasBasisTransform(dm, &transform));
2896: if (sf) {
2897: PetscCheck(mode != ADD_VALUES, PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_OUTOFRANGE, "Invalid insertion mode %d", (int)mode);
2899: PetscCall(VecGetArrayAndMemType(l, &lArray, &lmtype));
2900: PetscCall(VecGetArrayReadAndMemType(g, &gArray, &gmtype));
2901: PetscCall(PetscSFBcastEnd(sf, MPIU_SCALAR, gArray, lArray, MPI_REPLACE));
2902: PetscCall(VecRestoreArrayAndMemType(l, &lArray));
2903: PetscCall(VecRestoreArrayReadAndMemType(g, &gArray));
2904: if (transform) PetscCall(DMPlexGlobalToLocalBasis(dm, l));
2905: } else {
2906: PetscUseTypeMethod(dm, globaltolocalend, g, mode == INSERT_ALL_VALUES ? INSERT_VALUES : (mode == ADD_ALL_VALUES ? ADD_VALUES : mode), l);
2907: }
2908: PetscCall(DMGlobalToLocalHook_Constraints(dm, g, mode, l, NULL));
2909: for (link = dm->gtolhook; link; link = link->next) {
2910: if (link->endhook) PetscCall((*link->endhook)(dm, g, mode, l, link->ctx));
2911: }
2912: PetscFunctionReturn(PETSC_SUCCESS);
2913: }
2915: /*@C
2916: DMLocalToGlobalHookAdd - adds a callback to be run when a local to global is called
2918: Logically Collective
2920: Input Parameters:
2921: + dm - the `DM`
2922: . beginhook - function to run at the beginning of `DMLocalToGlobalBegin()`
2923: . endhook - function to run after `DMLocalToGlobalEnd()` has completed
2924: - ctx - [optional] user-defined context for provide data for the hooks (may be `NULL`)
2926: Calling sequence of `beginhook`:
2927: + global - global `DM`
2928: . l - local vector
2929: . mode - mode
2930: . g - global vector
2931: - ctx - optional user-defined function context
2933: Calling sequence of `endhook`:
2934: + global - global `DM`
2935: . l - local vector
2936: . mode - mode
2937: . g - global vector
2938: - ctx - optional user-defined function context
2940: Level: advanced
2942: .seealso: [](ch_dmbase), `DM`, `DMLocalToGlobal()`, `DMRefineHookAdd()`, `DMGlobalToLocalHookAdd()`, `SNESFASGetInterpolation()`, `SNESFASGetInjection()`, `PetscObjectCompose()`, `PetscContainerCreate()`
2943: @*/
2944: PetscErrorCode DMLocalToGlobalHookAdd(DM dm, PetscErrorCode (*beginhook)(DM global, Vec l, InsertMode mode, Vec g, void *ctx), PetscErrorCode (*endhook)(DM global, Vec l, InsertMode mode, Vec g, void *ctx), void *ctx)
2945: {
2946: DMLocalToGlobalHookLink link, *p;
2948: PetscFunctionBegin;
2950: for (p = &dm->ltoghook; *p; p = &(*p)->next) { } /* Scan to the end of the current list of hooks */
2951: PetscCall(PetscNew(&link));
2952: link->beginhook = beginhook;
2953: link->endhook = endhook;
2954: link->ctx = ctx;
2955: link->next = NULL;
2956: *p = link;
2957: PetscFunctionReturn(PETSC_SUCCESS);
2958: }
2960: static PetscErrorCode DMLocalToGlobalHook_Constraints(DM dm, Vec l, InsertMode mode, Vec g, void *ctx)
2961: {
2962: PetscFunctionBegin;
2963: (void)g;
2964: (void)ctx;
2966: if (mode == ADD_VALUES || mode == ADD_ALL_VALUES || mode == ADD_BC_VALUES) {
2967: Mat cMat;
2968: Vec cVec;
2969: PetscInt nRows;
2970: PetscSection section, cSec;
2971: PetscInt pStart, pEnd, p, dof;
2973: PetscCall(DMGetDefaultConstraints(dm, &cSec, &cMat, NULL));
2974: if (!cMat) PetscFunctionReturn(PETSC_SUCCESS);
2976: PetscCall(MatGetSize(cMat, &nRows, NULL));
2977: if (nRows <= 0) PetscFunctionReturn(PETSC_SUCCESS);
2978: PetscCall(DMGetLocalSection(dm, §ion));
2979: PetscCall(MatCreateVecs(cMat, NULL, &cVec));
2980: PetscCall(PetscSectionGetChart(cSec, &pStart, &pEnd));
2981: for (p = pStart; p < pEnd; p++) {
2982: PetscCall(PetscSectionGetDof(cSec, p, &dof));
2983: if (dof) {
2984: PetscInt d;
2985: PetscScalar *vals;
2986: PetscCall(VecGetValuesSection(l, section, p, &vals));
2987: PetscCall(VecSetValuesSection(cVec, cSec, p, vals, mode));
2988: /* for this to be the true transpose, we have to zero the values that
2989: * we just extracted */
2990: for (d = 0; d < dof; d++) vals[d] = 0.;
2991: }
2992: }
2993: PetscCall(MatMultTransposeAdd(cMat, cVec, l, l));
2994: PetscCall(VecDestroy(&cVec));
2995: }
2996: PetscFunctionReturn(PETSC_SUCCESS);
2997: }
2998: /*@
2999: DMLocalToGlobal - updates global vectors from local vectors
3001: Neighbor-wise Collective
3003: Input Parameters:
3004: + dm - the `DM` object
3005: . l - the local vector
3006: . mode - if `INSERT_VALUES` then no parallel communication is used, if `ADD_VALUES` then all ghost points from the same base point accumulate into that base point.
3007: - g - the global vector
3009: Level: beginner
3011: Notes:
3012: The communication involved in this update can be overlapped with computation by using
3013: `DMLocalToGlobalBegin()` and `DMLocalToGlobalEnd()`.
3015: In the `ADD_VALUES` case you normally would zero the receiving vector before beginning this operation.
3017: `INSERT_VALUES` is not supported for `DMDA`; in that case simply compute the values directly into a global vector instead of a local one.
3019: Use `DMLocalToGlobalHookAdd()` to add additional operations that are performed on the data during the update process
3021: .seealso: [](ch_dmbase), `DM`, `DMLocalToGlobalBegin()`, `DMLocalToGlobalEnd()`, `DMCoarsen()`, `DMDestroy()`, `DMView()`, `DMCreateGlobalVector()`, `DMCreateInterpolation()`, `DMGlobalToLocal()`, `DMGlobalToLocalEnd()`, `DMGlobalToLocalBegin()`, `DMLocalToGlobalHookAdd()`, `DMGlobaToLocallHookAdd()`
3022: @*/
3023: PetscErrorCode DMLocalToGlobal(DM dm, Vec l, InsertMode mode, Vec g)
3024: {
3025: PetscFunctionBegin;
3026: PetscCall(DMLocalToGlobalBegin(dm, l, mode, g));
3027: PetscCall(DMLocalToGlobalEnd(dm, l, mode, g));
3028: PetscFunctionReturn(PETSC_SUCCESS);
3029: }
3031: /*@
3032: DMLocalToGlobalBegin - begins updating global vectors from local vectors
3034: Neighbor-wise Collective
3036: Input Parameters:
3037: + dm - the `DM` object
3038: . l - the local vector
3039: . mode - if `INSERT_VALUES` then no parallel communication is used, if `ADD_VALUES` then all ghost points from the same base point accumulate into that base point.
3040: - g - the global vector
3042: Level: intermediate
3044: Notes:
3045: In the `ADD_VALUES` case you normally would zero the receiving vector before beginning this operation.
3047: `INSERT_VALUES is` not supported for `DMDA`, in that case simply compute the values directly into a global vector instead of a local one.
3049: Use `DMLocalToGlobalEnd()` to complete the communication process.
3051: `DMLocalToGlobal()` is a short form of `DMLocalToGlobalBegin()` and `DMLocalToGlobalEnd()`
3053: `DMLocalToGlobalHookAdd()` may be used to provide additional operations that are performed during the update process.
3055: .seealso: [](ch_dmbase), `DM`, `DMLocalToGlobal()`, `DMLocalToGlobalEnd()`, `DMCoarsen()`, `DMDestroy()`, `DMView()`, `DMCreateGlobalVector()`, `DMCreateInterpolation()`, `DMGlobalToLocal()`, `DMGlobalToLocalEnd()`, `DMGlobalToLocalBegin()`
3056: @*/
3057: PetscErrorCode DMLocalToGlobalBegin(DM dm, Vec l, InsertMode mode, Vec g)
3058: {
3059: PetscSF sf;
3060: PetscSection s, gs;
3061: DMLocalToGlobalHookLink link;
3062: Vec tmpl;
3063: const PetscScalar *lArray;
3064: PetscScalar *gArray;
3065: PetscBool isInsert, transform, l_inplace = PETSC_FALSE, g_inplace = PETSC_FALSE;
3066: PetscMemType lmtype = PETSC_MEMTYPE_HOST, gmtype = PETSC_MEMTYPE_HOST;
3068: PetscFunctionBegin;
3070: for (link = dm->ltoghook; link; link = link->next) {
3071: if (link->beginhook) PetscCall((*link->beginhook)(dm, l, mode, g, link->ctx));
3072: }
3073: PetscCall(DMLocalToGlobalHook_Constraints(dm, l, mode, g, NULL));
3074: PetscCall(DMGetSectionSF(dm, &sf));
3075: PetscCall(DMGetLocalSection(dm, &s));
3076: switch (mode) {
3077: case INSERT_VALUES:
3078: case INSERT_ALL_VALUES:
3079: case INSERT_BC_VALUES:
3080: isInsert = PETSC_TRUE;
3081: break;
3082: case ADD_VALUES:
3083: case ADD_ALL_VALUES:
3084: case ADD_BC_VALUES:
3085: isInsert = PETSC_FALSE;
3086: break;
3087: default:
3088: SETERRQ(PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_OUTOFRANGE, "Invalid insertion mode %d", mode);
3089: }
3090: if ((sf && !isInsert) || (s && isInsert)) {
3091: PetscCall(DMHasBasisTransform(dm, &transform));
3092: if (transform) {
3093: PetscCall(DMGetNamedLocalVector(dm, "__petsc_dm_transform_local_copy", &tmpl));
3094: PetscCall(VecCopy(l, tmpl));
3095: PetscCall(DMPlexLocalToGlobalBasis(dm, tmpl));
3096: PetscCall(VecGetArrayRead(tmpl, &lArray));
3097: } else if (isInsert) {
3098: PetscCall(VecGetArrayRead(l, &lArray));
3099: } else {
3100: PetscCall(VecGetArrayReadAndMemType(l, &lArray, &lmtype));
3101: l_inplace = PETSC_TRUE;
3102: }
3103: if (s && isInsert) {
3104: PetscCall(VecGetArray(g, &gArray));
3105: } else {
3106: PetscCall(VecGetArrayAndMemType(g, &gArray, &gmtype));
3107: g_inplace = PETSC_TRUE;
3108: }
3109: if (sf && !isInsert) {
3110: PetscCall(PetscSFReduceWithMemTypeBegin(sf, MPIU_SCALAR, lmtype, lArray, gmtype, gArray, MPIU_SUM));
3111: } else if (s && isInsert) {
3112: PetscInt gStart, pStart, pEnd, p;
3114: PetscCall(DMGetGlobalSection(dm, &gs));
3115: PetscCall(PetscSectionGetChart(s, &pStart, &pEnd));
3116: PetscCall(VecGetOwnershipRange(g, &gStart, NULL));
3117: for (p = pStart; p < pEnd; ++p) {
3118: PetscInt dof, gdof, cdof, gcdof, off, goff, d, e;
3120: PetscCall(PetscSectionGetDof(s, p, &dof));
3121: PetscCall(PetscSectionGetDof(gs, p, &gdof));
3122: PetscCall(PetscSectionGetConstraintDof(s, p, &cdof));
3123: PetscCall(PetscSectionGetConstraintDof(gs, p, &gcdof));
3124: PetscCall(PetscSectionGetOffset(s, p, &off));
3125: PetscCall(PetscSectionGetOffset(gs, p, &goff));
3126: /* Ignore off-process data and points with no global data */
3127: if (!gdof || goff < 0) continue;
3128: PetscCheck(dof == gdof, PETSC_COMM_SELF, PETSC_ERR_ARG_SIZ, "Inconsistent sizes, p: %" PetscInt_FMT " dof: %" PetscInt_FMT " gdof: %" PetscInt_FMT " cdof: %" PetscInt_FMT " gcdof: %" PetscInt_FMT, p, dof, gdof, cdof, gcdof);
3129: /* If no constraints are enforced in the global vector */
3130: if (!gcdof) {
3131: for (d = 0; d < dof; ++d) gArray[goff - gStart + d] = lArray[off + d];
3132: /* If constraints are enforced in the global vector */
3133: } else if (cdof == gcdof) {
3134: const PetscInt *cdofs;
3135: PetscInt cind = 0;
3137: PetscCall(PetscSectionGetConstraintIndices(s, p, &cdofs));
3138: for (d = 0, e = 0; d < dof; ++d) {
3139: if ((cind < cdof) && (d == cdofs[cind])) {
3140: ++cind;
3141: continue;
3142: }
3143: gArray[goff - gStart + e++] = lArray[off + d];
3144: }
3145: } else SETERRQ(PETSC_COMM_SELF, PETSC_ERR_ARG_SIZ, "Inconsistent sizes, p: %" PetscInt_FMT " dof: %" PetscInt_FMT " gdof: %" PetscInt_FMT " cdof: %" PetscInt_FMT " gcdof: %" PetscInt_FMT, p, dof, gdof, cdof, gcdof);
3146: }
3147: }
3148: if (g_inplace) {
3149: PetscCall(VecRestoreArrayAndMemType(g, &gArray));
3150: } else {
3151: PetscCall(VecRestoreArray(g, &gArray));
3152: }
3153: if (transform) {
3154: PetscCall(VecRestoreArrayRead(tmpl, &lArray));
3155: PetscCall(DMRestoreNamedLocalVector(dm, "__petsc_dm_transform_local_copy", &tmpl));
3156: } else if (l_inplace) {
3157: PetscCall(VecRestoreArrayReadAndMemType(l, &lArray));
3158: } else {
3159: PetscCall(VecRestoreArrayRead(l, &lArray));
3160: }
3161: } else {
3162: PetscUseTypeMethod(dm, localtoglobalbegin, l, mode == INSERT_ALL_VALUES ? INSERT_VALUES : (mode == ADD_ALL_VALUES ? ADD_VALUES : mode), g);
3163: }
3164: PetscFunctionReturn(PETSC_SUCCESS);
3165: }
3167: /*@
3168: DMLocalToGlobalEnd - updates global vectors from local vectors
3170: Neighbor-wise Collective
3172: Input Parameters:
3173: + dm - the `DM` object
3174: . l - the local vector
3175: . mode - `INSERT_VALUES` or `ADD_VALUES`
3176: - g - the global vector
3178: Level: intermediate
3180: Note:
3181: See `DMLocalToGlobalBegin()` for full details
3183: .seealso: [](ch_dmbase), `DM`, `DMLocalToGlobalBegin()`, `DMCoarsen()`, `DMDestroy()`, `DMView()`, `DMCreateGlobalVector()`, `DMCreateInterpolation()`, `DMGlobalToLocalEnd()`
3184: @*/
3185: PetscErrorCode DMLocalToGlobalEnd(DM dm, Vec l, InsertMode mode, Vec g)
3186: {
3187: PetscSF sf;
3188: PetscSection s;
3189: DMLocalToGlobalHookLink link;
3190: PetscBool isInsert, transform;
3192: PetscFunctionBegin;
3194: PetscCall(DMGetSectionSF(dm, &sf));
3195: PetscCall(DMGetLocalSection(dm, &s));
3196: switch (mode) {
3197: case INSERT_VALUES:
3198: case INSERT_ALL_VALUES:
3199: isInsert = PETSC_TRUE;
3200: break;
3201: case ADD_VALUES:
3202: case ADD_ALL_VALUES:
3203: isInsert = PETSC_FALSE;
3204: break;
3205: default:
3206: SETERRQ(PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_OUTOFRANGE, "Invalid insertion mode %d", mode);
3207: }
3208: if (sf && !isInsert) {
3209: const PetscScalar *lArray;
3210: PetscScalar *gArray;
3211: Vec tmpl;
3213: PetscCall(DMHasBasisTransform(dm, &transform));
3214: if (transform) {
3215: PetscCall(DMGetNamedLocalVector(dm, "__petsc_dm_transform_local_copy", &tmpl));
3216: PetscCall(VecGetArrayRead(tmpl, &lArray));
3217: } else {
3218: PetscCall(VecGetArrayReadAndMemType(l, &lArray, NULL));
3219: }
3220: PetscCall(VecGetArrayAndMemType(g, &gArray, NULL));
3221: PetscCall(PetscSFReduceEnd(sf, MPIU_SCALAR, lArray, gArray, MPIU_SUM));
3222: if (transform) {
3223: PetscCall(VecRestoreArrayRead(tmpl, &lArray));
3224: PetscCall(DMRestoreNamedLocalVector(dm, "__petsc_dm_transform_local_copy", &tmpl));
3225: } else {
3226: PetscCall(VecRestoreArrayReadAndMemType(l, &lArray));
3227: }
3228: PetscCall(VecRestoreArrayAndMemType(g, &gArray));
3229: } else if (s && isInsert) {
3230: } else {
3231: PetscUseTypeMethod(dm, localtoglobalend, l, mode == INSERT_ALL_VALUES ? INSERT_VALUES : (mode == ADD_ALL_VALUES ? ADD_VALUES : mode), g);
3232: }
3233: for (link = dm->ltoghook; link; link = link->next) {
3234: if (link->endhook) PetscCall((*link->endhook)(dm, g, mode, l, link->ctx));
3235: }
3236: PetscFunctionReturn(PETSC_SUCCESS);
3237: }
3239: /*@
3240: DMLocalToLocalBegin - Begins the process of mapping values from a local vector (that include
3241: ghost points that contain irrelevant values) to another local vector where the ghost points
3242: in the second are set correctly from values on other MPI ranks.
3244: Neighbor-wise Collective
3246: Input Parameters:
3247: + dm - the `DM` object
3248: . g - the original local vector
3249: - mode - one of `INSERT_VALUES` or `ADD_VALUES`
3251: Output Parameter:
3252: . l - the local vector with correct ghost values
3254: Level: intermediate
3256: Note:
3257: Must be followed by `DMLocalToLocalEnd()`.
3259: .seealso: [](ch_dmbase), `DM`, `DMLocalToLocalEnd()`, `DMCoarsen()`, `DMDestroy()`, `DMView()`, `DMCreateLocalVector()`, `DMCreateGlobalVector()`, `DMCreateInterpolation()`, `DMGlobalToLocalEnd()`, `DMLocalToGlobalBegin()`
3260: @*/
3261: PetscErrorCode DMLocalToLocalBegin(DM dm, Vec g, InsertMode mode, Vec l)
3262: {
3263: PetscFunctionBegin;
3267: PetscUseTypeMethod(dm, localtolocalbegin, g, mode == INSERT_ALL_VALUES ? INSERT_VALUES : (mode == ADD_ALL_VALUES ? ADD_VALUES : mode), l);
3268: PetscFunctionReturn(PETSC_SUCCESS);
3269: }
3271: /*@
3272: DMLocalToLocalEnd - Maps from a local vector to another local vector where the ghost
3273: points in the second are set correctly. Must be preceded by `DMLocalToLocalBegin()`.
3275: Neighbor-wise Collective
3277: Input Parameters:
3278: + dm - the `DM` object
3279: . g - the original local vector
3280: - mode - one of `INSERT_VALUES` or `ADD_VALUES`
3282: Output Parameter:
3283: . l - the local vector with correct ghost values
3285: Level: intermediate
3287: .seealso: [](ch_dmbase), `DM`, `DMLocalToLocalBegin()`, `DMCoarsen()`, `DMDestroy()`, `DMView()`, `DMCreateLocalVector()`, `DMCreateGlobalVector()`, `DMCreateInterpolation()`, `DMGlobalToLocalEnd()`, `DMLocalToGlobalBegin()`
3288: @*/
3289: PetscErrorCode DMLocalToLocalEnd(DM dm, Vec g, InsertMode mode, Vec l)
3290: {
3291: PetscFunctionBegin;
3295: PetscUseTypeMethod(dm, localtolocalend, g, mode == INSERT_ALL_VALUES ? INSERT_VALUES : (mode == ADD_ALL_VALUES ? ADD_VALUES : mode), l);
3296: PetscFunctionReturn(PETSC_SUCCESS);
3297: }
3299: /*@
3300: DMCoarsen - Coarsens a `DM` object using a standard, non-adaptive coarsening of the underlying mesh
3302: Collective
3304: Input Parameters:
3305: + dm - the `DM` object
3306: - comm - the communicator to contain the new `DM` object (or `MPI_COMM_NULL`)
3308: Output Parameter:
3309: . dmc - the coarsened `DM`
3311: Level: developer
3313: .seealso: [](ch_dmbase), `DM`, `DMRefine()`, `DMDestroy()`, `DMView()`, `DMCreateGlobalVector()`, `DMCreateInterpolation()`, `DMCreateDomainDecomposition()`,
3314: `DMCoarsenHookAdd()`, `DMCoarsenHookRemove()`
3315: @*/
3316: PetscErrorCode DMCoarsen(DM dm, MPI_Comm comm, DM *dmc)
3317: {
3318: DMCoarsenHookLink link;
3320: PetscFunctionBegin;
3322: PetscCall(PetscLogEventBegin(DM_Coarsen, dm, 0, 0, 0));
3323: PetscUseTypeMethod(dm, coarsen, comm, dmc);
3324: if (*dmc) {
3325: (*dmc)->bind_below = dm->bind_below; /* Propagate this from parent DM; otherwise -dm_bind_below will be useless for multigrid cases. */
3326: PetscCall(DMSetCoarseDM(dm, *dmc));
3327: (*dmc)->ops->creatematrix = dm->ops->creatematrix;
3328: PetscCall(PetscObjectCopyFortranFunctionPointers((PetscObject)dm, (PetscObject)*dmc));
3329: (*dmc)->ctx = dm->ctx;
3330: (*dmc)->levelup = dm->levelup;
3331: (*dmc)->leveldown = dm->leveldown + 1;
3332: PetscCall(DMSetMatType(*dmc, dm->mattype));
3333: for (link = dm->coarsenhook; link; link = link->next) {
3334: if (link->coarsenhook) PetscCall((*link->coarsenhook)(dm, *dmc, link->ctx));
3335: }
3336: }
3337: PetscCall(PetscLogEventEnd(DM_Coarsen, dm, 0, 0, 0));
3338: PetscCheck(*dmc, PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "NULL coarse mesh produced");
3339: PetscFunctionReturn(PETSC_SUCCESS);
3340: }
3342: /*@C
3343: DMCoarsenHookAdd - adds a callback to be run when restricting a nonlinear problem to the coarse grid
3345: Logically Collective; No Fortran Support
3347: Input Parameters:
3348: + fine - `DM` on which to run a hook when restricting to a coarser level
3349: . coarsenhook - function to run when setting up a coarser level
3350: . restricthook - function to run to update data on coarser levels (called once per `SNESSolve()`)
3351: - ctx - [optional] user-defined context for provide data for the hooks (may be `NULL`)
3353: Calling sequence of `coarsenhook`:
3354: + fine - fine level `DM`
3355: . coarse - coarse level `DM` to restrict problem to
3356: - ctx - optional user-defined function context
3358: Calling sequence of `restricthook`:
3359: + fine - fine level `DM`
3360: . mrestrict - matrix restricting a fine-level solution to the coarse grid, usually the transpose of the interpolation
3361: . rscale - scaling vector for restriction
3362: . inject - matrix restricting by injection
3363: . coarse - coarse level DM to update
3364: - ctx - optional user-defined function context
3366: Level: advanced
3368: Notes:
3369: This function is only needed if auxiliary data, attached to the `DM` with `PetscObjectCompose()`, needs to be set up or passed from the fine `DM` to the coarse `DM`.
3371: If this function is called multiple times, the hooks will be run in the order they are added.
3373: In order to compose with nonlinear preconditioning without duplicating storage, the hook should be implemented to
3374: extract the finest level information from its context (instead of from the `SNES`).
3376: The hooks are automatically called by `DMRestrict()`
3378: .seealso: [](ch_dmbase), `DM`, `DMCoarsenHookRemove()`, `DMRefineHookAdd()`, `SNESFASGetInterpolation()`, `SNESFASGetInjection()`, `PetscObjectCompose()`, `PetscContainerCreate()`
3379: @*/
3380: PetscErrorCode DMCoarsenHookAdd(DM fine, PetscErrorCode (*coarsenhook)(DM fine, DM coarse, void *ctx), PetscErrorCode (*restricthook)(DM fine, Mat mrestrict, Vec rscale, Mat inject, DM coarse, void *ctx), void *ctx)
3381: {
3382: DMCoarsenHookLink link, *p;
3384: PetscFunctionBegin;
3386: for (p = &fine->coarsenhook; *p; p = &(*p)->next) { /* Scan to the end of the current list of hooks */
3387: if ((*p)->coarsenhook == coarsenhook && (*p)->restricthook == restricthook && (*p)->ctx == ctx) PetscFunctionReturn(PETSC_SUCCESS);
3388: }
3389: PetscCall(PetscNew(&link));
3390: link->coarsenhook = coarsenhook;
3391: link->restricthook = restricthook;
3392: link->ctx = ctx;
3393: link->next = NULL;
3394: *p = link;
3395: PetscFunctionReturn(PETSC_SUCCESS);
3396: }
3398: /*@C
3399: DMCoarsenHookRemove - remove a callback set with `DMCoarsenHookAdd()`
3401: Logically Collective; No Fortran Support
3403: Input Parameters:
3404: + fine - `DM` on which to run a hook when restricting to a coarser level
3405: . coarsenhook - function to run when setting up a coarser level
3406: . restricthook - function to run to update data on coarser levels
3407: - ctx - [optional] user-defined context for provide data for the hooks (may be `NULL`)
3409: Level: advanced
3411: Notes:
3412: This function does nothing if the `coarsenhook` is not in the list.
3414: See `DMCoarsenHookAdd()` for the calling sequence of `coarsenhook` and `restricthook`
3416: .seealso: [](ch_dmbase), `DM`, `DMCoarsenHookAdd()`, `DMRefineHookAdd()`, `SNESFASGetInterpolation()`, `SNESFASGetInjection()`, `PetscObjectCompose()`, `PetscContainerCreate()`
3417: @*/
3418: PetscErrorCode DMCoarsenHookRemove(DM fine, PetscErrorCode (*coarsenhook)(DM, DM, void *), PetscErrorCode (*restricthook)(DM, Mat, Vec, Mat, DM, void *), void *ctx)
3419: {
3420: DMCoarsenHookLink link, *p;
3422: PetscFunctionBegin;
3424: for (p = &fine->coarsenhook; *p; p = &(*p)->next) { /* Search the list of current hooks */
3425: if ((*p)->coarsenhook == coarsenhook && (*p)->restricthook == restricthook && (*p)->ctx == ctx) {
3426: link = *p;
3427: *p = link->next;
3428: PetscCall(PetscFree(link));
3429: break;
3430: }
3431: }
3432: PetscFunctionReturn(PETSC_SUCCESS);
3433: }
3435: /*@
3436: DMRestrict - restricts user-defined problem data to a coarser `DM` by running hooks registered by `DMCoarsenHookAdd()`
3438: Collective if any hooks are
3440: Input Parameters:
3441: + fine - finer `DM` from which the data is obtained
3442: . restrct - restriction matrix, apply using `MatRestrict()`, usually the transpose of the interpolation
3443: . rscale - scaling vector for restriction
3444: . inject - injection matrix, also use `MatRestrict()`
3445: - coarse - coarser `DM` to update
3447: Level: developer
3449: Developer Note:
3450: Though this routine is called `DMRestrict()` the hooks are added with `DMCoarsenHookAdd()`, a consistent terminology would be better
3452: .seealso: [](ch_dmbase), `DM`, `DMCoarsenHookAdd()`, `MatRestrict()`, `DMInterpolate()`, `DMRefineHookAdd()`
3453: @*/
3454: PetscErrorCode DMRestrict(DM fine, Mat restrct, Vec rscale, Mat inject, DM coarse)
3455: {
3456: DMCoarsenHookLink link;
3458: PetscFunctionBegin;
3459: for (link = fine->coarsenhook; link; link = link->next) {
3460: if (link->restricthook) PetscCall((*link->restricthook)(fine, restrct, rscale, inject, coarse, link->ctx));
3461: }
3462: PetscFunctionReturn(PETSC_SUCCESS);
3463: }
3465: /*@C
3466: DMSubDomainHookAdd - adds a callback to be run when restricting a problem to subdomain `DM`s with `DMCreateDomainDecomposition()`
3468: Logically Collective; No Fortran Support
3470: Input Parameters:
3471: + global - global `DM`
3472: . ddhook - function to run to pass data to the decomposition `DM` upon its creation
3473: . restricthook - function to run to update data on block solve (at the beginning of the block solve)
3474: - ctx - [optional] user-defined context for provide data for the hooks (may be `NULL`)
3476: Calling sequence of `ddhook`:
3477: + global - global `DM`
3478: . block - subdomain `DM`
3479: - ctx - optional user-defined function context
3481: Calling sequence of `restricthook`:
3482: + global - global `DM`
3483: . out - scatter to the outer (with ghost and overlap points) sub vector
3484: . in - scatter to sub vector values only owned locally
3485: . block - subdomain `DM`
3486: - ctx - optional user-defined function context
3488: Level: advanced
3490: Notes:
3491: This function can be used if auxiliary data needs to be set up on subdomain `DM`s.
3493: If this function is called multiple times, the hooks will be run in the order they are added.
3495: In order to compose with nonlinear preconditioning without duplicating storage, the hook should be implemented to
3496: extract the global information from its context (instead of from the `SNES`).
3498: Developer Note:
3499: It is unclear what "block solve" means within the definition of `restricthook`
3501: .seealso: [](ch_dmbase), `DM`, `DMSubDomainHookRemove()`, `DMRefineHookAdd()`, `SNESFASGetInterpolation()`, `SNESFASGetInjection()`, `PetscObjectCompose()`, `PetscContainerCreate()`, `DMCreateDomainDecomposition()`
3502: @*/
3503: PetscErrorCode DMSubDomainHookAdd(DM global, PetscErrorCode (*ddhook)(DM global, DM block, void *ctx), PetscErrorCode (*restricthook)(DM global, VecScatter out, VecScatter in, DM block, void *ctx), void *ctx)
3504: {
3505: DMSubDomainHookLink link, *p;
3507: PetscFunctionBegin;
3509: for (p = &global->subdomainhook; *p; p = &(*p)->next) { /* Scan to the end of the current list of hooks */
3510: if ((*p)->ddhook == ddhook && (*p)->restricthook == restricthook && (*p)->ctx == ctx) PetscFunctionReturn(PETSC_SUCCESS);
3511: }
3512: PetscCall(PetscNew(&link));
3513: link->restricthook = restricthook;
3514: link->ddhook = ddhook;
3515: link->ctx = ctx;
3516: link->next = NULL;
3517: *p = link;
3518: PetscFunctionReturn(PETSC_SUCCESS);
3519: }
3521: /*@C
3522: DMSubDomainHookRemove - remove a callback from the list to be run when restricting a problem to subdomain `DM`s with `DMCreateDomainDecomposition()`
3524: Logically Collective; No Fortran Support
3526: Input Parameters:
3527: + global - global `DM`
3528: . ddhook - function to run to pass data to the decomposition `DM` upon its creation
3529: . restricthook - function to run to update data on block solve (at the beginning of the block solve)
3530: - ctx - [optional] user-defined context for provide data for the hooks (may be `NULL`)
3532: Level: advanced
3534: Note:
3535: See `DMSubDomainHookAdd()` for the calling sequences of `ddhook` and `restricthook`
3537: .seealso: [](ch_dmbase), `DM`, `DMSubDomainHookAdd()`, `SNESFASGetInterpolation()`, `SNESFASGetInjection()`, `PetscObjectCompose()`, `PetscContainerCreate()`,
3538: `DMCreateDomainDecomposition()`
3539: @*/
3540: PetscErrorCode DMSubDomainHookRemove(DM global, PetscErrorCode (*ddhook)(DM, DM, void *), PetscErrorCode (*restricthook)(DM, VecScatter, VecScatter, DM, void *), void *ctx)
3541: {
3542: DMSubDomainHookLink link, *p;
3544: PetscFunctionBegin;
3546: for (p = &global->subdomainhook; *p; p = &(*p)->next) { /* Search the list of current hooks */
3547: if ((*p)->ddhook == ddhook && (*p)->restricthook == restricthook && (*p)->ctx == ctx) {
3548: link = *p;
3549: *p = link->next;
3550: PetscCall(PetscFree(link));
3551: break;
3552: }
3553: }
3554: PetscFunctionReturn(PETSC_SUCCESS);
3555: }
3557: /*@
3558: DMSubDomainRestrict - restricts user-defined problem data to a subdomain `DM` by running hooks registered by `DMSubDomainHookAdd()`
3560: Collective if any hooks are
3562: Input Parameters:
3563: + global - The global `DM` to use as a base
3564: . oscatter - The scatter from domain global vector filling subdomain global vector with overlap
3565: . gscatter - The scatter from domain global vector filling subdomain local vector with ghosts
3566: - subdm - The subdomain `DM` to update
3568: Level: developer
3570: .seealso: [](ch_dmbase), `DM`, `DMCoarsenHookAdd()`, `MatRestrict()`, `DMCreateDomainDecomposition()`
3571: @*/
3572: PetscErrorCode DMSubDomainRestrict(DM global, VecScatter oscatter, VecScatter gscatter, DM subdm)
3573: {
3574: DMSubDomainHookLink link;
3576: PetscFunctionBegin;
3577: for (link = global->subdomainhook; link; link = link->next) {
3578: if (link->restricthook) PetscCall((*link->restricthook)(global, oscatter, gscatter, subdm, link->ctx));
3579: }
3580: PetscFunctionReturn(PETSC_SUCCESS);
3581: }
3583: /*@
3584: DMGetCoarsenLevel - Gets the number of coarsenings that have generated this `DM`.
3586: Not Collective
3588: Input Parameter:
3589: . dm - the `DM` object
3591: Output Parameter:
3592: . level - number of coarsenings
3594: Level: developer
3596: .seealso: [](ch_dmbase), `DM`, `DMCoarsen()`, `DMSetCoarsenLevel()`, `DMGetRefineLevel()`, `DMDestroy()`, `DMView()`, `DMCreateGlobalVector()`, `DMCreateInterpolation()`
3597: @*/
3598: PetscErrorCode DMGetCoarsenLevel(DM dm, PetscInt *level)
3599: {
3600: PetscFunctionBegin;
3602: PetscAssertPointer(level, 2);
3603: *level = dm->leveldown;
3604: PetscFunctionReturn(PETSC_SUCCESS);
3605: }
3607: /*@
3608: DMSetCoarsenLevel - Sets the number of coarsenings that have generated this `DM`.
3610: Collective
3612: Input Parameters:
3613: + dm - the `DM` object
3614: - level - number of coarsenings
3616: Level: developer
3618: Note:
3619: This is rarely used directly, the information is automatically set when a `DM` is created with `DMCoarsen()`
3621: .seealso: [](ch_dmbase), `DM`, `DMCoarsen()`, `DMGetCoarsenLevel()`, `DMGetRefineLevel()`, `DMDestroy()`, `DMView()`, `DMCreateGlobalVector()`, `DMCreateInterpolation()`
3622: @*/
3623: PetscErrorCode DMSetCoarsenLevel(DM dm, PetscInt level)
3624: {
3625: PetscFunctionBegin;
3627: dm->leveldown = level;
3628: PetscFunctionReturn(PETSC_SUCCESS);
3629: }
3631: /*@
3632: DMRefineHierarchy - Refines a `DM` object, all levels at once
3634: Collective
3636: Input Parameters:
3637: + dm - the `DM` object
3638: - nlevels - the number of levels of refinement
3640: Output Parameter:
3641: . dmf - the refined `DM` hierarchy
3643: Level: developer
3645: .seealso: [](ch_dmbase), `DM`, `DMCoarsen()`, `DMCoarsenHierarchy()`, `DMDestroy()`, `DMView()`, `DMCreateGlobalVector()`, `DMCreateInterpolation()`
3646: @*/
3647: PetscErrorCode DMRefineHierarchy(DM dm, PetscInt nlevels, DM dmf[])
3648: {
3649: PetscFunctionBegin;
3651: PetscCheck(nlevels >= 0, PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_OUTOFRANGE, "nlevels cannot be negative");
3652: if (nlevels == 0) PetscFunctionReturn(PETSC_SUCCESS);
3653: PetscAssertPointer(dmf, 3);
3654: if (dm->ops->refine && !dm->ops->refinehierarchy) {
3655: PetscInt i;
3657: PetscCall(DMRefine(dm, PetscObjectComm((PetscObject)dm), &dmf[0]));
3658: for (i = 1; i < nlevels; i++) PetscCall(DMRefine(dmf[i - 1], PetscObjectComm((PetscObject)dm), &dmf[i]));
3659: } else PetscUseTypeMethod(dm, refinehierarchy, nlevels, dmf);
3660: PetscFunctionReturn(PETSC_SUCCESS);
3661: }
3663: /*@
3664: DMCoarsenHierarchy - Coarsens a `DM` object, all levels at once
3666: Collective
3668: Input Parameters:
3669: + dm - the `DM` object
3670: - nlevels - the number of levels of coarsening
3672: Output Parameter:
3673: . dmc - the coarsened `DM` hierarchy
3675: Level: developer
3677: .seealso: [](ch_dmbase), `DM`, `DMCoarsen()`, `DMRefineHierarchy()`, `DMDestroy()`, `DMView()`, `DMCreateGlobalVector()`, `DMCreateInterpolation()`
3678: @*/
3679: PetscErrorCode DMCoarsenHierarchy(DM dm, PetscInt nlevels, DM dmc[])
3680: {
3681: PetscFunctionBegin;
3683: PetscCheck(nlevels >= 0, PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_OUTOFRANGE, "nlevels cannot be negative");
3684: if (nlevels == 0) PetscFunctionReturn(PETSC_SUCCESS);
3685: PetscAssertPointer(dmc, 3);
3686: if (dm->ops->coarsen && !dm->ops->coarsenhierarchy) {
3687: PetscInt i;
3689: PetscCall(DMCoarsen(dm, PetscObjectComm((PetscObject)dm), &dmc[0]));
3690: for (i = 1; i < nlevels; i++) PetscCall(DMCoarsen(dmc[i - 1], PetscObjectComm((PetscObject)dm), &dmc[i]));
3691: } else PetscUseTypeMethod(dm, coarsenhierarchy, nlevels, dmc);
3692: PetscFunctionReturn(PETSC_SUCCESS);
3693: }
3695: /*@C
3696: DMSetApplicationContextDestroy - Sets a user function that will be called to destroy the application context when the `DM` is destroyed
3698: Logically Collective if the function is collective
3700: Input Parameters:
3701: + dm - the `DM` object
3702: - destroy - the destroy function, see `PetscCtxDestroyFn` for the calling sequence
3704: Level: intermediate
3706: .seealso: [](ch_dmbase), `DM`, `DMSetApplicationContext()`, `DMView()`, `DMCreateGlobalVector()`, `DMCreateInterpolation()`, `DMCreateColoring()`, `DMCreateMatrix()`, `DMCreateMassMatrix()`,
3707: `DMGetApplicationContext()`, `PetscCtxDestroyFn`
3708: @*/
3709: PetscErrorCode DMSetApplicationContextDestroy(DM dm, PetscCtxDestroyFn *destroy)
3710: {
3711: PetscFunctionBegin;
3713: dm->ctxdestroy = destroy;
3714: PetscFunctionReturn(PETSC_SUCCESS);
3715: }
3717: /*@
3718: DMSetApplicationContext - Set a user context into a `DM` object
3720: Not Collective
3722: Input Parameters:
3723: + dm - the `DM` object
3724: - ctx - the user context
3726: Level: intermediate
3728: Notes:
3729: A user context is a way to pass problem specific information that is accessible whenever the `DM` is available
3730: In a multilevel solver, the user context is shared by all the `DM` in the hierarchy; it is thus not advisable
3731: to store objects that represent discretized quantities inside the context.
3733: .seealso: [](ch_dmbase), `DM`, `DMGetApplicationContext()`, `DMView()`, `DMCreateGlobalVector()`, `DMCreateInterpolation()`, `DMCreateColoring()`, `DMCreateMatrix()`, `DMCreateMassMatrix()`
3734: @*/
3735: PetscErrorCode DMSetApplicationContext(DM dm, void *ctx)
3736: {
3737: PetscFunctionBegin;
3739: dm->ctx = ctx;
3740: PetscFunctionReturn(PETSC_SUCCESS);
3741: }
3743: /*@
3744: DMGetApplicationContext - Gets a user context from a `DM` object
3746: Not Collective
3748: Input Parameter:
3749: . dm - the `DM` object
3751: Output Parameter:
3752: . ctx - the user context
3754: Level: intermediate
3756: Note:
3757: A user context is a way to pass problem specific information that is accessible whenever the `DM` is available
3759: .seealso: [](ch_dmbase), `DM`, `DMView()`, `DMCreateGlobalVector()`, `DMCreateInterpolation()`, `DMCreateColoring()`, `DMCreateMatrix()`, `DMCreateMassMatrix()`
3760: @*/
3761: PetscErrorCode DMGetApplicationContext(DM dm, void *ctx)
3762: {
3763: PetscFunctionBegin;
3765: *(void **)ctx = dm->ctx;
3766: PetscFunctionReturn(PETSC_SUCCESS);
3767: }
3769: /*@C
3770: DMSetVariableBounds - sets a function to compute the lower and upper bound vectors for `SNESVI`.
3772: Logically Collective
3774: Input Parameters:
3775: + dm - the DM object
3776: - f - the function that computes variable bounds used by SNESVI (use `NULL` to cancel a previous function that was set)
3778: Level: intermediate
3780: .seealso: [](ch_dmbase), `DM`, `DMComputeVariableBounds()`, `DMHasVariableBounds()`, `DMView()`, `DMCreateGlobalVector()`, `DMCreateInterpolation()`, `DMCreateColoring()`, `DMCreateMatrix()`, `DMCreateMassMatrix()`, `DMGetApplicationContext()`,
3781: `DMSetJacobian()`
3782: @*/
3783: PetscErrorCode DMSetVariableBounds(DM dm, PetscErrorCode (*f)(DM, Vec, Vec))
3784: {
3785: PetscFunctionBegin;
3787: dm->ops->computevariablebounds = f;
3788: PetscFunctionReturn(PETSC_SUCCESS);
3789: }
3791: /*@
3792: DMHasVariableBounds - does the `DM` object have a variable bounds function?
3794: Not Collective
3796: Input Parameter:
3797: . dm - the `DM` object to destroy
3799: Output Parameter:
3800: . flg - `PETSC_TRUE` if the variable bounds function exists
3802: Level: developer
3804: .seealso: [](ch_dmbase), `DM`, `DMComputeVariableBounds()`, `DMView()`, `DMCreateGlobalVector()`, `DMCreateInterpolation()`, `DMCreateColoring()`, `DMCreateMatrix()`, `DMCreateMassMatrix()`, `DMGetApplicationContext()`
3805: @*/
3806: PetscErrorCode DMHasVariableBounds(DM dm, PetscBool *flg)
3807: {
3808: PetscFunctionBegin;
3810: PetscAssertPointer(flg, 2);
3811: *flg = (dm->ops->computevariablebounds) ? PETSC_TRUE : PETSC_FALSE;
3812: PetscFunctionReturn(PETSC_SUCCESS);
3813: }
3815: /*@
3816: DMComputeVariableBounds - compute variable bounds used by `SNESVI`.
3818: Logically Collective
3820: Input Parameter:
3821: . dm - the `DM` object
3823: Output Parameters:
3824: + xl - lower bound
3825: - xu - upper bound
3827: Level: advanced
3829: Note:
3830: This is generally not called by users. It calls the function provided by the user with DMSetVariableBounds()
3832: .seealso: [](ch_dmbase), `DM`, `DMHasVariableBounds()`, `DMView()`, `DMCreateGlobalVector()`, `DMCreateInterpolation()`, `DMCreateColoring()`, `DMCreateMatrix()`, `DMCreateMassMatrix()`, `DMGetApplicationContext()`
3833: @*/
3834: PetscErrorCode DMComputeVariableBounds(DM dm, Vec xl, Vec xu)
3835: {
3836: PetscFunctionBegin;
3840: PetscUseTypeMethod(dm, computevariablebounds, xl, xu);
3841: PetscFunctionReturn(PETSC_SUCCESS);
3842: }
3844: /*@
3845: DMHasColoring - does the `DM` object have a method of providing a coloring?
3847: Not Collective
3849: Input Parameter:
3850: . dm - the DM object
3852: Output Parameter:
3853: . flg - `PETSC_TRUE` if the `DM` has facilities for `DMCreateColoring()`.
3855: Level: developer
3857: .seealso: [](ch_dmbase), `DM`, `DMCreateColoring()`
3858: @*/
3859: PetscErrorCode DMHasColoring(DM dm, PetscBool *flg)
3860: {
3861: PetscFunctionBegin;
3863: PetscAssertPointer(flg, 2);
3864: *flg = (dm->ops->getcoloring) ? PETSC_TRUE : PETSC_FALSE;
3865: PetscFunctionReturn(PETSC_SUCCESS);
3866: }
3868: /*@
3869: DMHasCreateRestriction - does the `DM` object have a method of providing a restriction?
3871: Not Collective
3873: Input Parameter:
3874: . dm - the `DM` object
3876: Output Parameter:
3877: . flg - `PETSC_TRUE` if the `DM` has facilities for `DMCreateRestriction()`.
3879: Level: developer
3881: .seealso: [](ch_dmbase), `DM`, `DMCreateRestriction()`, `DMHasCreateInterpolation()`, `DMHasCreateInjection()`
3882: @*/
3883: PetscErrorCode DMHasCreateRestriction(DM dm, PetscBool *flg)
3884: {
3885: PetscFunctionBegin;
3887: PetscAssertPointer(flg, 2);
3888: *flg = (dm->ops->createrestriction) ? PETSC_TRUE : PETSC_FALSE;
3889: PetscFunctionReturn(PETSC_SUCCESS);
3890: }
3892: /*@
3893: DMHasCreateInjection - does the `DM` object have a method of providing an injection?
3895: Not Collective
3897: Input Parameter:
3898: . dm - the `DM` object
3900: Output Parameter:
3901: . flg - `PETSC_TRUE` if the `DM` has facilities for `DMCreateInjection()`.
3903: Level: developer
3905: .seealso: [](ch_dmbase), `DM`, `DMCreateInjection()`, `DMHasCreateRestriction()`, `DMHasCreateInterpolation()`
3906: @*/
3907: PetscErrorCode DMHasCreateInjection(DM dm, PetscBool *flg)
3908: {
3909: PetscFunctionBegin;
3911: PetscAssertPointer(flg, 2);
3912: if (dm->ops->hascreateinjection) PetscUseTypeMethod(dm, hascreateinjection, flg);
3913: else *flg = (dm->ops->createinjection) ? PETSC_TRUE : PETSC_FALSE;
3914: PetscFunctionReturn(PETSC_SUCCESS);
3915: }
3917: PetscFunctionList DMList = NULL;
3918: PetscBool DMRegisterAllCalled = PETSC_FALSE;
3920: /*@
3921: DMSetType - Builds a `DM`, for a particular `DM` implementation.
3923: Collective
3925: Input Parameters:
3926: + dm - The `DM` object
3927: - method - The name of the `DMType`, for example `DMDA`, `DMPLEX`
3929: Options Database Key:
3930: . -dm_type <type> - Sets the `DM` type; use -help for a list of available types
3932: Level: intermediate
3934: Note:
3935: Of the `DM` is constructed by directly calling a function to construct a particular `DM`, for example, `DMDACreate2d()` or `DMPlexCreateBoxMesh()`
3937: .seealso: [](ch_dmbase), `DM`, `DMType`, `DMDA`, `DMPLEX`, `DMGetType()`, `DMCreate()`, `DMDACreate2d()`
3938: @*/
3939: PetscErrorCode DMSetType(DM dm, DMType method)
3940: {
3941: PetscErrorCode (*r)(DM);
3942: PetscBool match;
3944: PetscFunctionBegin;
3946: PetscCall(PetscObjectTypeCompare((PetscObject)dm, method, &match));
3947: if (match) PetscFunctionReturn(PETSC_SUCCESS);
3949: PetscCall(DMRegisterAll());
3950: PetscCall(PetscFunctionListFind(DMList, method, &r));
3951: PetscCheck(r, PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_UNKNOWN_TYPE, "Unknown DM type: %s", method);
3953: PetscTryTypeMethod(dm, destroy);
3954: PetscCall(PetscMemzero(dm->ops, sizeof(*dm->ops)));
3955: PetscCall(PetscObjectChangeTypeName((PetscObject)dm, method));
3956: PetscCall((*r)(dm));
3957: PetscFunctionReturn(PETSC_SUCCESS);
3958: }
3960: /*@
3961: DMGetType - Gets the `DM` type name (as a string) from the `DM`.
3963: Not Collective
3965: Input Parameter:
3966: . dm - The `DM`
3968: Output Parameter:
3969: . type - The `DMType` name
3971: Level: intermediate
3973: .seealso: [](ch_dmbase), `DM`, `DMType`, `DMDA`, `DMPLEX`, `DMSetType()`, `DMCreate()`
3974: @*/
3975: PetscErrorCode DMGetType(DM dm, DMType *type)
3976: {
3977: PetscFunctionBegin;
3979: PetscAssertPointer(type, 2);
3980: PetscCall(DMRegisterAll());
3981: *type = ((PetscObject)dm)->type_name;
3982: PetscFunctionReturn(PETSC_SUCCESS);
3983: }
3985: /*@
3986: DMConvert - Converts a `DM` to another `DM`, either of the same or different type.
3988: Collective
3990: Input Parameters:
3991: + dm - the `DM`
3992: - newtype - new `DM` type (use "same" for the same type)
3994: Output Parameter:
3995: . M - pointer to new `DM`
3997: Level: intermediate
3999: Note:
4000: Cannot be used to convert a sequential `DM` to a parallel or a parallel to sequential,
4001: the MPI communicator of the generated `DM` is always the same as the communicator
4002: of the input `DM`.
4004: .seealso: [](ch_dmbase), `DM`, `DMSetType()`, `DMCreate()`, `DMClone()`
4005: @*/
4006: PetscErrorCode DMConvert(DM dm, DMType newtype, DM *M)
4007: {
4008: DM B;
4009: char convname[256];
4010: PetscBool sametype /*, issame */;
4012: PetscFunctionBegin;
4015: PetscAssertPointer(M, 3);
4016: PetscCall(PetscObjectTypeCompare((PetscObject)dm, newtype, &sametype));
4017: /* PetscCall(PetscStrcmp(newtype, "same", &issame)); */
4018: if (sametype) {
4019: *M = dm;
4020: PetscCall(PetscObjectReference((PetscObject)dm));
4021: PetscFunctionReturn(PETSC_SUCCESS);
4022: } else {
4023: PetscErrorCode (*conv)(DM, DMType, DM *) = NULL;
4025: /*
4026: Order of precedence:
4027: 1) See if a specialized converter is known to the current DM.
4028: 2) See if a specialized converter is known to the desired DM class.
4029: 3) See if a good general converter is registered for the desired class
4030: 4) See if a good general converter is known for the current matrix.
4031: 5) Use a really basic converter.
4032: */
4034: /* 1) See if a specialized converter is known to the current DM and the desired class */
4035: PetscCall(PetscStrncpy(convname, "DMConvert_", sizeof(convname)));
4036: PetscCall(PetscStrlcat(convname, ((PetscObject)dm)->type_name, sizeof(convname)));
4037: PetscCall(PetscStrlcat(convname, "_", sizeof(convname)));
4038: PetscCall(PetscStrlcat(convname, newtype, sizeof(convname)));
4039: PetscCall(PetscStrlcat(convname, "_C", sizeof(convname)));
4040: PetscCall(PetscObjectQueryFunction((PetscObject)dm, convname, &conv));
4041: if (conv) goto foundconv;
4043: /* 2) See if a specialized converter is known to the desired DM class. */
4044: PetscCall(DMCreate(PetscObjectComm((PetscObject)dm), &B));
4045: PetscCall(DMSetType(B, newtype));
4046: PetscCall(PetscStrncpy(convname, "DMConvert_", sizeof(convname)));
4047: PetscCall(PetscStrlcat(convname, ((PetscObject)dm)->type_name, sizeof(convname)));
4048: PetscCall(PetscStrlcat(convname, "_", sizeof(convname)));
4049: PetscCall(PetscStrlcat(convname, newtype, sizeof(convname)));
4050: PetscCall(PetscStrlcat(convname, "_C", sizeof(convname)));
4051: PetscCall(PetscObjectQueryFunction((PetscObject)B, convname, &conv));
4052: if (conv) {
4053: PetscCall(DMDestroy(&B));
4054: goto foundconv;
4055: }
4057: #if 0
4058: /* 3) See if a good general converter is registered for the desired class */
4059: conv = B->ops->convertfrom;
4060: PetscCall(DMDestroy(&B));
4061: if (conv) goto foundconv;
4063: /* 4) See if a good general converter is known for the current matrix */
4064: if (dm->ops->convert) {
4065: conv = dm->ops->convert;
4066: }
4067: if (conv) goto foundconv;
4068: #endif
4070: /* 5) Use a really basic converter. */
4071: SETERRQ(PetscObjectComm((PetscObject)dm), PETSC_ERR_SUP, "No conversion possible between DM types %s and %s", ((PetscObject)dm)->type_name, newtype);
4073: foundconv:
4074: PetscCall(PetscLogEventBegin(DM_Convert, dm, 0, 0, 0));
4075: PetscCall((*conv)(dm, newtype, M));
4076: /* Things that are independent of DM type: We should consult DMClone() here */
4077: {
4078: const PetscReal *maxCell, *Lstart, *L;
4080: PetscCall(DMGetPeriodicity(dm, &maxCell, &Lstart, &L));
4081: PetscCall(DMSetPeriodicity(*M, maxCell, Lstart, L));
4082: (*M)->prealloc_only = dm->prealloc_only;
4083: PetscCall(PetscFree((*M)->vectype));
4084: PetscCall(PetscStrallocpy(dm->vectype, (char **)&(*M)->vectype));
4085: PetscCall(PetscFree((*M)->mattype));
4086: PetscCall(PetscStrallocpy(dm->mattype, (char **)&(*M)->mattype));
4087: }
4088: PetscCall(PetscLogEventEnd(DM_Convert, dm, 0, 0, 0));
4089: }
4090: PetscCall(PetscObjectStateIncrease((PetscObject)*M));
4091: PetscFunctionReturn(PETSC_SUCCESS);
4092: }
4094: /*--------------------------------------------------------------------------------------------------------------------*/
4096: /*@C
4097: DMRegister - Adds a new `DM` type implementation
4099: Not Collective, No Fortran Support
4101: Input Parameters:
4102: + sname - The name of a new user-defined creation routine
4103: - function - The creation routine itself
4105: Level: advanced
4107: Note:
4108: `DMRegister()` may be called multiple times to add several user-defined `DM`s
4110: Example Usage:
4111: .vb
4112: DMRegister("my_da", MyDMCreate);
4113: .ve
4115: Then, your `DM` type can be chosen with the procedural interface via
4116: .vb
4117: DMCreate(MPI_Comm, DM *);
4118: DMSetType(DM,"my_da");
4119: .ve
4120: or at runtime via the option
4121: .vb
4122: -da_type my_da
4123: .ve
4125: .seealso: [](ch_dmbase), `DM`, `DMType`, `DMSetType()`, `DMRegisterAll()`, `DMRegisterDestroy()`
4126: @*/
4127: PetscErrorCode DMRegister(const char sname[], PetscErrorCode (*function)(DM))
4128: {
4129: PetscFunctionBegin;
4130: PetscCall(DMInitializePackage());
4131: PetscCall(PetscFunctionListAdd(&DMList, sname, function));
4132: PetscFunctionReturn(PETSC_SUCCESS);
4133: }
4135: /*@
4136: DMLoad - Loads a DM that has been stored in binary with `DMView()`.
4138: Collective
4140: Input Parameters:
4141: + newdm - the newly loaded `DM`, this needs to have been created with `DMCreate()` or
4142: some related function before a call to `DMLoad()`.
4143: - viewer - binary file viewer, obtained from `PetscViewerBinaryOpen()` or
4144: `PETSCVIEWERHDF5` file viewer, obtained from `PetscViewerHDF5Open()`
4146: Level: intermediate
4148: Notes:
4149: The type is determined by the data in the file, any type set into the DM before this call is ignored.
4151: Using `PETSCVIEWERHDF5` type with `PETSC_VIEWER_HDF5_PETSC` format, one can save multiple `DMPLEX`
4152: meshes in a single HDF5 file. This in turn requires one to name the `DMPLEX` object with `PetscObjectSetName()`
4153: before saving it with `DMView()` and before loading it with `DMLoad()` for identification of the mesh object.
4155: .seealso: [](ch_dmbase), `DM`, `PetscViewerBinaryOpen()`, `DMView()`, `MatLoad()`, `VecLoad()`
4156: @*/
4157: PetscErrorCode DMLoad(DM newdm, PetscViewer viewer)
4158: {
4159: PetscBool isbinary, ishdf5;
4161: PetscFunctionBegin;
4164: PetscCall(PetscViewerCheckReadable(viewer));
4165: PetscCall(PetscObjectTypeCompare((PetscObject)viewer, PETSCVIEWERBINARY, &isbinary));
4166: PetscCall(PetscObjectTypeCompare((PetscObject)viewer, PETSCVIEWERHDF5, &ishdf5));
4167: PetscCall(PetscLogEventBegin(DM_Load, viewer, 0, 0, 0));
4168: if (isbinary) {
4169: PetscInt classid;
4170: char type[256];
4172: PetscCall(PetscViewerBinaryRead(viewer, &classid, 1, NULL, PETSC_INT));
4173: PetscCheck(classid == DM_FILE_CLASSID, PetscObjectComm((PetscObject)newdm), PETSC_ERR_ARG_WRONG, "Not DM next in file, classid found %" PetscInt_FMT, classid);
4174: PetscCall(PetscViewerBinaryRead(viewer, type, 256, NULL, PETSC_CHAR));
4175: PetscCall(DMSetType(newdm, type));
4176: PetscTryTypeMethod(newdm, load, viewer);
4177: } else if (ishdf5) {
4178: PetscTryTypeMethod(newdm, load, viewer);
4179: } else SETERRQ(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Invalid viewer; open viewer with PetscViewerBinaryOpen() or PetscViewerHDF5Open()");
4180: PetscCall(PetscLogEventEnd(DM_Load, viewer, 0, 0, 0));
4181: PetscFunctionReturn(PETSC_SUCCESS);
4182: }
4184: /* FEM Support */
4186: PetscErrorCode DMPrintCellIndices(PetscInt c, const char name[], PetscInt len, const PetscInt x[])
4187: {
4188: PetscInt f;
4190: PetscFunctionBegin;
4191: PetscCall(PetscPrintf(PETSC_COMM_SELF, "Cell %" PetscInt_FMT " Element %s\n", c, name));
4192: for (f = 0; f < len; ++f) PetscCall(PetscPrintf(PETSC_COMM_SELF, " | %" PetscInt_FMT " |\n", x[f]));
4193: PetscFunctionReturn(PETSC_SUCCESS);
4194: }
4196: PetscErrorCode DMPrintCellVector(PetscInt c, const char name[], PetscInt len, const PetscScalar x[])
4197: {
4198: PetscInt f;
4200: PetscFunctionBegin;
4201: PetscCall(PetscPrintf(PETSC_COMM_SELF, "Cell %" PetscInt_FMT " Element %s\n", c, name));
4202: for (f = 0; f < len; ++f) PetscCall(PetscPrintf(PETSC_COMM_SELF, " | %g |\n", (double)PetscRealPart(x[f])));
4203: PetscFunctionReturn(PETSC_SUCCESS);
4204: }
4206: PetscErrorCode DMPrintCellVectorReal(PetscInt c, const char name[], PetscInt len, const PetscReal x[])
4207: {
4208: PetscInt f;
4210: PetscFunctionBegin;
4211: PetscCall(PetscPrintf(PETSC_COMM_SELF, "Cell %" PetscInt_FMT " Element %s\n", c, name));
4212: for (f = 0; f < len; ++f) PetscCall(PetscPrintf(PETSC_COMM_SELF, " | %g |\n", (double)x[f]));
4213: PetscFunctionReturn(PETSC_SUCCESS);
4214: }
4216: PetscErrorCode DMPrintCellMatrix(PetscInt c, const char name[], PetscInt rows, PetscInt cols, const PetscScalar A[])
4217: {
4218: PetscInt f, g;
4220: PetscFunctionBegin;
4221: PetscCall(PetscPrintf(PETSC_COMM_SELF, "Cell %" PetscInt_FMT " Element %s\n", c, name));
4222: for (f = 0; f < rows; ++f) {
4223: PetscCall(PetscPrintf(PETSC_COMM_SELF, " |"));
4224: for (g = 0; g < cols; ++g) PetscCall(PetscPrintf(PETSC_COMM_SELF, " % 9.5g", (double)PetscRealPart(A[f * cols + g])));
4225: PetscCall(PetscPrintf(PETSC_COMM_SELF, " |\n"));
4226: }
4227: PetscFunctionReturn(PETSC_SUCCESS);
4228: }
4230: PetscErrorCode DMPrintLocalVec(DM dm, const char name[], PetscReal tol, Vec X)
4231: {
4232: PetscInt localSize, bs;
4233: PetscMPIInt size;
4234: Vec x, xglob;
4235: const PetscScalar *xarray;
4237: PetscFunctionBegin;
4238: PetscCallMPI(MPI_Comm_size(PetscObjectComm((PetscObject)dm), &size));
4239: PetscCall(VecDuplicate(X, &x));
4240: PetscCall(VecCopy(X, x));
4241: PetscCall(VecFilter(x, tol));
4242: PetscCall(PetscPrintf(PetscObjectComm((PetscObject)dm), "%s:\n", name));
4243: if (size > 1) {
4244: PetscCall(VecGetLocalSize(x, &localSize));
4245: PetscCall(VecGetArrayRead(x, &xarray));
4246: PetscCall(VecGetBlockSize(x, &bs));
4247: PetscCall(VecCreateMPIWithArray(PetscObjectComm((PetscObject)dm), bs, localSize, PETSC_DETERMINE, xarray, &xglob));
4248: } else {
4249: xglob = x;
4250: }
4251: PetscCall(VecView(xglob, PETSC_VIEWER_STDOUT_(PetscObjectComm((PetscObject)dm))));
4252: if (size > 1) {
4253: PetscCall(VecDestroy(&xglob));
4254: PetscCall(VecRestoreArrayRead(x, &xarray));
4255: }
4256: PetscCall(VecDestroy(&x));
4257: PetscFunctionReturn(PETSC_SUCCESS);
4258: }
4260: /*@
4261: DMGetLocalSection - Get the `PetscSection` encoding the local data layout for the `DM`.
4263: Input Parameter:
4264: . dm - The `DM`
4266: Output Parameter:
4267: . section - The `PetscSection`
4269: Options Database Key:
4270: . -dm_petscsection_view - View the section created by the `DM`
4272: Level: intermediate
4274: Note:
4275: This gets a borrowed reference, so the user should not destroy this `PetscSection`.
4277: .seealso: [](ch_dmbase), `DM`, `DMSetLocalSection()`, `DMGetGlobalSection()`
4278: @*/
4279: PetscErrorCode DMGetLocalSection(DM dm, PetscSection *section)
4280: {
4281: PetscFunctionBegin;
4283: PetscAssertPointer(section, 2);
4284: if (!dm->localSection && dm->ops->createlocalsection) {
4285: PetscInt d;
4287: if (dm->setfromoptionscalled) {
4288: PetscObject obj = (PetscObject)dm;
4289: PetscViewer viewer;
4290: PetscViewerFormat format;
4291: PetscBool flg;
4293: PetscCall(PetscOptionsCreateViewer(PetscObjectComm(obj), obj->options, obj->prefix, "-dm_petscds_view", &viewer, &format, &flg));
4294: if (flg) PetscCall(PetscViewerPushFormat(viewer, format));
4295: for (d = 0; d < dm->Nds; ++d) {
4296: PetscCall(PetscDSSetFromOptions(dm->probs[d].ds));
4297: if (flg) PetscCall(PetscDSView(dm->probs[d].ds, viewer));
4298: }
4299: if (flg) {
4300: PetscCall(PetscViewerFlush(viewer));
4301: PetscCall(PetscViewerPopFormat(viewer));
4302: PetscCall(PetscViewerDestroy(&viewer));
4303: }
4304: }
4305: PetscUseTypeMethod(dm, createlocalsection);
4306: if (dm->localSection) PetscCall(PetscObjectViewFromOptions((PetscObject)dm->localSection, NULL, "-dm_petscsection_view"));
4307: }
4308: *section = dm->localSection;
4309: PetscFunctionReturn(PETSC_SUCCESS);
4310: }
4312: /*@
4313: DMSetLocalSection - Set the `PetscSection` encoding the local data layout for the `DM`.
4315: Input Parameters:
4316: + dm - The `DM`
4317: - section - The `PetscSection`
4319: Level: intermediate
4321: Note:
4322: Any existing Section will be destroyed
4324: .seealso: [](ch_dmbase), `DM`, `PetscSection`, `DMGetLocalSection()`, `DMSetGlobalSection()`
4325: @*/
4326: PetscErrorCode DMSetLocalSection(DM dm, PetscSection section)
4327: {
4328: PetscInt numFields = 0;
4329: PetscInt f;
4331: PetscFunctionBegin;
4334: PetscCall(PetscObjectReference((PetscObject)section));
4335: PetscCall(PetscSectionDestroy(&dm->localSection));
4336: dm->localSection = section;
4337: if (section) PetscCall(PetscSectionGetNumFields(dm->localSection, &numFields));
4338: if (numFields) {
4339: PetscCall(DMSetNumFields(dm, numFields));
4340: for (f = 0; f < numFields; ++f) {
4341: PetscObject disc;
4342: const char *name;
4344: PetscCall(PetscSectionGetFieldName(dm->localSection, f, &name));
4345: PetscCall(DMGetField(dm, f, NULL, &disc));
4346: PetscCall(PetscObjectSetName(disc, name));
4347: }
4348: }
4349: /* The global section and the SectionSF will be rebuilt
4350: in the next call to DMGetGlobalSection() and DMGetSectionSF(). */
4351: PetscCall(PetscSectionDestroy(&dm->globalSection));
4352: PetscCall(PetscSFDestroy(&dm->sectionSF));
4353: PetscCall(PetscSFCreate(PetscObjectComm((PetscObject)dm), &dm->sectionSF));
4355: /* Clear scratch vectors */
4356: PetscCall(DMClearGlobalVectors(dm));
4357: PetscCall(DMClearLocalVectors(dm));
4358: PetscCall(DMClearNamedGlobalVectors(dm));
4359: PetscCall(DMClearNamedLocalVectors(dm));
4360: PetscFunctionReturn(PETSC_SUCCESS);
4361: }
4363: /*@C
4364: DMCreateSectionPermutation - Create a permutation of the `PetscSection` chart and optionally a block structure.
4366: Input Parameter:
4367: . dm - The `DM`
4369: Output Parameters:
4370: + perm - A permutation of the mesh points in the chart
4371: - blockStarts - A high bit is set for the point that begins every block, or `NULL` for default blocking
4373: Level: developer
4375: .seealso: [](ch_dmbase), `DM`, `PetscSection`, `DMGetLocalSection()`, `DMGetGlobalSection()`
4376: @*/
4377: PetscErrorCode DMCreateSectionPermutation(DM dm, IS *perm, PetscBT *blockStarts)
4378: {
4379: PetscFunctionBegin;
4380: *perm = NULL;
4381: *blockStarts = NULL;
4382: PetscTryTypeMethod(dm, createsectionpermutation, perm, blockStarts);
4383: PetscFunctionReturn(PETSC_SUCCESS);
4384: }
4386: /*@
4387: DMGetDefaultConstraints - Get the `PetscSection` and `Mat` that specify the local constraint interpolation. See `DMSetDefaultConstraints()` for a description of the purpose of constraint interpolation.
4389: not Collective
4391: Input Parameter:
4392: . dm - The `DM`
4394: Output Parameters:
4395: + section - The `PetscSection` describing the range of the constraint matrix: relates rows of the constraint matrix to dofs of the default section. Returns `NULL` if there are no local constraints.
4396: . mat - The `Mat` that interpolates local constraints: its width should be the layout size of the default section. Returns `NULL` if there are no local constraints.
4397: - bias - Vector containing bias to be added to constrained dofs
4399: Level: advanced
4401: Note:
4402: This gets borrowed references, so the user should not destroy the `PetscSection`, `Mat`, or `Vec`.
4404: .seealso: [](ch_dmbase), `DM`, `DMSetDefaultConstraints()`
4405: @*/
4406: PetscErrorCode DMGetDefaultConstraints(DM dm, PetscSection *section, Mat *mat, Vec *bias)
4407: {
4408: PetscFunctionBegin;
4410: if (!dm->defaultConstraint.section && !dm->defaultConstraint.mat && dm->ops->createdefaultconstraints) PetscUseTypeMethod(dm, createdefaultconstraints);
4411: if (section) *section = dm->defaultConstraint.section;
4412: if (mat) *mat = dm->defaultConstraint.mat;
4413: if (bias) *bias = dm->defaultConstraint.bias;
4414: PetscFunctionReturn(PETSC_SUCCESS);
4415: }
4417: /*@
4418: DMSetDefaultConstraints - Set the `PetscSection` and `Mat` that specify the local constraint interpolation.
4420: Collective
4422: Input Parameters:
4423: + dm - The `DM`
4424: . section - The `PetscSection` describing the range of the constraint matrix: relates rows of the constraint matrix to dofs of the default section. Must have a local communicator (`PETSC_COMM_SELF` or derivative).
4425: . mat - The `Mat` that interpolates local constraints: its width should be the layout size of the default section: `NULL` indicates no constraints. Must have a local communicator (`PETSC_COMM_SELF` or derivative).
4426: - bias - A bias vector to be added to constrained values in the local vector. `NULL` indicates no bias. Must have a local communicator (`PETSC_COMM_SELF` or derivative).
4428: Level: advanced
4430: Notes:
4431: If a constraint matrix is specified, then it is applied during `DMGlobalToLocalEnd()` when mode is `INSERT_VALUES`, `INSERT_BC_VALUES`, or `INSERT_ALL_VALUES`. Without a constraint matrix, the local vector l returned by `DMGlobalToLocalEnd()` contains values that have been scattered from a global vector without modification; with a constraint matrix A, l is modified by computing c = A * l + bias, l[s[i]] = c[i], where the scatter s is defined by the `PetscSection` returned by `DMGetDefaultConstraints()`.
4433: If a constraint matrix is specified, then its adjoint is applied during `DMLocalToGlobalBegin()` when mode is `ADD_VALUES`, `ADD_BC_VALUES`, or `ADD_ALL_VALUES`. Without a constraint matrix, the local vector l is accumulated into a global vector without modification; with a constraint matrix A, l is first modified by computing c[i] = l[s[i]], l[s[i]] = 0, l = l + A'*c, which is the adjoint of the operation described above. Any bias, if specified, is ignored when accumulating.
4435: This increments the references of the `PetscSection`, `Mat`, and `Vec`, so they user can destroy them.
4437: .seealso: [](ch_dmbase), `DM`, `DMGetDefaultConstraints()`
4438: @*/
4439: PetscErrorCode DMSetDefaultConstraints(DM dm, PetscSection section, Mat mat, Vec bias)
4440: {
4441: PetscMPIInt result;
4443: PetscFunctionBegin;
4445: if (section) {
4447: PetscCallMPI(MPI_Comm_compare(PETSC_COMM_SELF, PetscObjectComm((PetscObject)section), &result));
4448: PetscCheck(result == MPI_CONGRUENT || result == MPI_IDENT, PETSC_COMM_SELF, PETSC_ERR_ARG_NOTSAMECOMM, "constraint section must have local communicator");
4449: }
4450: if (mat) {
4452: PetscCallMPI(MPI_Comm_compare(PETSC_COMM_SELF, PetscObjectComm((PetscObject)mat), &result));
4453: PetscCheck(result == MPI_CONGRUENT || result == MPI_IDENT, PETSC_COMM_SELF, PETSC_ERR_ARG_NOTSAMECOMM, "constraint matrix must have local communicator");
4454: }
4455: if (bias) {
4457: PetscCallMPI(MPI_Comm_compare(PETSC_COMM_SELF, PetscObjectComm((PetscObject)bias), &result));
4458: PetscCheck(result == MPI_CONGRUENT || result == MPI_IDENT, PETSC_COMM_SELF, PETSC_ERR_ARG_NOTSAMECOMM, "constraint bias must have local communicator");
4459: }
4460: PetscCall(PetscObjectReference((PetscObject)section));
4461: PetscCall(PetscSectionDestroy(&dm->defaultConstraint.section));
4462: dm->defaultConstraint.section = section;
4463: PetscCall(PetscObjectReference((PetscObject)mat));
4464: PetscCall(MatDestroy(&dm->defaultConstraint.mat));
4465: dm->defaultConstraint.mat = mat;
4466: PetscCall(PetscObjectReference((PetscObject)bias));
4467: PetscCall(VecDestroy(&dm->defaultConstraint.bias));
4468: dm->defaultConstraint.bias = bias;
4469: PetscFunctionReturn(PETSC_SUCCESS);
4470: }
4472: #if defined(PETSC_USE_DEBUG)
4473: /*
4474: DMDefaultSectionCheckConsistency - Check the consistentcy of the global and local sections. Generates and error if they are not consistent.
4476: Input Parameters:
4477: + dm - The `DM`
4478: . localSection - `PetscSection` describing the local data layout
4479: - globalSection - `PetscSection` describing the global data layout
4481: Level: intermediate
4483: .seealso: [](ch_dmbase), `DM`, `DMGetSectionSF()`, `DMSetSectionSF()`
4484: */
4485: static PetscErrorCode DMDefaultSectionCheckConsistency_Internal(DM dm, PetscSection localSection, PetscSection globalSection)
4486: {
4487: MPI_Comm comm;
4488: PetscLayout layout;
4489: const PetscInt *ranges;
4490: PetscInt pStart, pEnd, p, nroots;
4491: PetscMPIInt size, rank;
4492: PetscBool valid = PETSC_TRUE, gvalid;
4494: PetscFunctionBegin;
4495: PetscCall(PetscObjectGetComm((PetscObject)dm, &comm));
4497: PetscCallMPI(MPI_Comm_size(comm, &size));
4498: PetscCallMPI(MPI_Comm_rank(comm, &rank));
4499: PetscCall(PetscSectionGetChart(globalSection, &pStart, &pEnd));
4500: PetscCall(PetscSectionGetConstrainedStorageSize(globalSection, &nroots));
4501: PetscCall(PetscLayoutCreate(comm, &layout));
4502: PetscCall(PetscLayoutSetBlockSize(layout, 1));
4503: PetscCall(PetscLayoutSetLocalSize(layout, nroots));
4504: PetscCall(PetscLayoutSetUp(layout));
4505: PetscCall(PetscLayoutGetRanges(layout, &ranges));
4506: for (p = pStart; p < pEnd; ++p) {
4507: PetscInt dof, cdof, off, gdof, gcdof, goff, gsize, d;
4509: PetscCall(PetscSectionGetDof(localSection, p, &dof));
4510: PetscCall(PetscSectionGetOffset(localSection, p, &off));
4511: PetscCall(PetscSectionGetConstraintDof(localSection, p, &cdof));
4512: PetscCall(PetscSectionGetDof(globalSection, p, &gdof));
4513: PetscCall(PetscSectionGetConstraintDof(globalSection, p, &gcdof));
4514: PetscCall(PetscSectionGetOffset(globalSection, p, &goff));
4515: if (!gdof) continue; /* Censored point */
4516: if ((gdof < 0 ? -(gdof + 1) : gdof) != dof) {
4517: PetscCall(PetscSynchronizedPrintf(comm, "[%d]Global dof %" PetscInt_FMT " for point %" PetscInt_FMT " not equal to local dof %" PetscInt_FMT "\n", rank, gdof, p, dof));
4518: valid = PETSC_FALSE;
4519: }
4520: if (gcdof && (gcdof != cdof)) {
4521: PetscCall(PetscSynchronizedPrintf(comm, "[%d]Global constraints %" PetscInt_FMT " for point %" PetscInt_FMT " not equal to local constraints %" PetscInt_FMT "\n", rank, gcdof, p, cdof));
4522: valid = PETSC_FALSE;
4523: }
4524: if (gdof < 0) {
4525: gsize = gdof < 0 ? -(gdof + 1) - gcdof : gdof - gcdof;
4526: for (d = 0; d < gsize; ++d) {
4527: PetscInt offset = -(goff + 1) + d, r;
4529: PetscCall(PetscFindInt(offset, size + 1, ranges, &r));
4530: if (r < 0) r = -(r + 2);
4531: if ((r < 0) || (r >= size)) {
4532: PetscCall(PetscSynchronizedPrintf(comm, "[%d]Point %" PetscInt_FMT " mapped to invalid process %" PetscInt_FMT " (%" PetscInt_FMT ", %" PetscInt_FMT ")\n", rank, p, r, gdof, goff));
4533: valid = PETSC_FALSE;
4534: break;
4535: }
4536: }
4537: }
4538: }
4539: PetscCall(PetscLayoutDestroy(&layout));
4540: PetscCall(PetscSynchronizedFlush(comm, NULL));
4541: PetscCallMPI(MPIU_Allreduce(&valid, &gvalid, 1, MPIU_BOOL, MPI_LAND, comm));
4542: if (!gvalid) {
4543: PetscCall(DMView(dm, NULL));
4544: SETERRQ(comm, PETSC_ERR_ARG_WRONG, "Inconsistent local and global sections");
4545: }
4546: PetscFunctionReturn(PETSC_SUCCESS);
4547: }
4548: #endif
4550: PetscErrorCode DMGetIsoperiodicPointSF_Internal(DM dm, PetscSF *sf)
4551: {
4552: PetscErrorCode (*f)(DM, PetscSF *);
4554: PetscFunctionBegin;
4556: PetscAssertPointer(sf, 2);
4557: PetscCall(PetscObjectQueryFunction((PetscObject)dm, "DMGetIsoperiodicPointSF_C", &f));
4558: if (f) PetscCall(f(dm, sf));
4559: else *sf = dm->sf;
4560: PetscFunctionReturn(PETSC_SUCCESS);
4561: }
4563: /*@
4564: DMGetGlobalSection - Get the `PetscSection` encoding the global data layout for the `DM`.
4566: Collective
4568: Input Parameter:
4569: . dm - The `DM`
4571: Output Parameter:
4572: . section - The `PetscSection`
4574: Level: intermediate
4576: Note:
4577: This gets a borrowed reference, so the user should not destroy this `PetscSection`.
4579: .seealso: [](ch_dmbase), `DM`, `DMSetLocalSection()`, `DMGetLocalSection()`
4580: @*/
4581: PetscErrorCode DMGetGlobalSection(DM dm, PetscSection *section)
4582: {
4583: PetscFunctionBegin;
4585: PetscAssertPointer(section, 2);
4586: if (!dm->globalSection) {
4587: PetscSection s;
4588: PetscSF sf;
4590: PetscCall(DMGetLocalSection(dm, &s));
4591: PetscCheck(s, PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_WRONGSTATE, "DM must have a default PetscSection in order to create a global PetscSection");
4592: PetscCheck(dm->sf, PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_WRONGSTATE, "DM must have a point PetscSF in order to create a global PetscSection");
4593: PetscCall(DMGetIsoperiodicPointSF_Internal(dm, &sf));
4594: PetscCall(PetscSectionCreateGlobalSection(s, sf, PETSC_TRUE, PETSC_FALSE, PETSC_FALSE, &dm->globalSection));
4595: PetscCall(PetscLayoutDestroy(&dm->map));
4596: PetscCall(PetscSectionGetValueLayout(PetscObjectComm((PetscObject)dm), dm->globalSection, &dm->map));
4597: PetscCall(PetscSectionViewFromOptions(dm->globalSection, NULL, "-global_section_view"));
4598: }
4599: *section = dm->globalSection;
4600: PetscFunctionReturn(PETSC_SUCCESS);
4601: }
4603: /*@
4604: DMSetGlobalSection - Set the `PetscSection` encoding the global data layout for the `DM`.
4606: Input Parameters:
4607: + dm - The `DM`
4608: - section - The PetscSection, or `NULL`
4610: Level: intermediate
4612: Note:
4613: Any existing `PetscSection` will be destroyed
4615: .seealso: [](ch_dmbase), `DM`, `DMGetGlobalSection()`, `DMSetLocalSection()`
4616: @*/
4617: PetscErrorCode DMSetGlobalSection(DM dm, PetscSection section)
4618: {
4619: PetscFunctionBegin;
4622: PetscCall(PetscObjectReference((PetscObject)section));
4623: PetscCall(PetscSectionDestroy(&dm->globalSection));
4624: dm->globalSection = section;
4625: #if defined(PETSC_USE_DEBUG)
4626: if (section) PetscCall(DMDefaultSectionCheckConsistency_Internal(dm, dm->localSection, section));
4627: #endif
4628: /* Clear global scratch vectors and sectionSF */
4629: PetscCall(PetscSFDestroy(&dm->sectionSF));
4630: PetscCall(PetscSFCreate(PetscObjectComm((PetscObject)dm), &dm->sectionSF));
4631: PetscCall(DMClearGlobalVectors(dm));
4632: PetscCall(DMClearNamedGlobalVectors(dm));
4633: PetscFunctionReturn(PETSC_SUCCESS);
4634: }
4636: /*@
4637: DMGetSectionSF - Get the `PetscSF` encoding the parallel dof overlap for the `DM`. If it has not been set,
4638: it is created from the default `PetscSection` layouts in the `DM`.
4640: Input Parameter:
4641: . dm - The `DM`
4643: Output Parameter:
4644: . sf - The `PetscSF`
4646: Level: intermediate
4648: Note:
4649: This gets a borrowed reference, so the user should not destroy this `PetscSF`.
4651: .seealso: [](ch_dmbase), `DM`, `DMSetSectionSF()`, `DMCreateSectionSF()`
4652: @*/
4653: PetscErrorCode DMGetSectionSF(DM dm, PetscSF *sf)
4654: {
4655: PetscInt nroots;
4657: PetscFunctionBegin;
4659: PetscAssertPointer(sf, 2);
4660: if (!dm->sectionSF) PetscCall(PetscSFCreate(PetscObjectComm((PetscObject)dm), &dm->sectionSF));
4661: PetscCall(PetscSFGetGraph(dm->sectionSF, &nroots, NULL, NULL, NULL));
4662: if (nroots < 0) {
4663: PetscSection section, gSection;
4665: PetscCall(DMGetLocalSection(dm, §ion));
4666: if (section) {
4667: PetscCall(DMGetGlobalSection(dm, &gSection));
4668: PetscCall(DMCreateSectionSF(dm, section, gSection));
4669: } else {
4670: *sf = NULL;
4671: PetscFunctionReturn(PETSC_SUCCESS);
4672: }
4673: }
4674: *sf = dm->sectionSF;
4675: PetscFunctionReturn(PETSC_SUCCESS);
4676: }
4678: /*@
4679: DMSetSectionSF - Set the `PetscSF` encoding the parallel dof overlap for the `DM`
4681: Input Parameters:
4682: + dm - The `DM`
4683: - sf - The `PetscSF`
4685: Level: intermediate
4687: Note:
4688: Any previous `PetscSF` is destroyed
4690: .seealso: [](ch_dmbase), `DM`, `DMGetSectionSF()`, `DMCreateSectionSF()`
4691: @*/
4692: PetscErrorCode DMSetSectionSF(DM dm, PetscSF sf)
4693: {
4694: PetscFunctionBegin;
4697: PetscCall(PetscObjectReference((PetscObject)sf));
4698: PetscCall(PetscSFDestroy(&dm->sectionSF));
4699: dm->sectionSF = sf;
4700: PetscFunctionReturn(PETSC_SUCCESS);
4701: }
4703: /*@
4704: DMCreateSectionSF - Create the `PetscSF` encoding the parallel dof overlap for the `DM` based upon the `PetscSection`s
4705: describing the data layout.
4707: Input Parameters:
4708: + dm - The `DM`
4709: . localSection - `PetscSection` describing the local data layout
4710: - globalSection - `PetscSection` describing the global data layout
4712: Level: developer
4714: Note:
4715: One usually uses `DMGetSectionSF()` to obtain the `PetscSF`
4717: Developer Note:
4718: Since this routine has for arguments the two sections from the `DM` and puts the resulting `PetscSF`
4719: directly into the `DM`, perhaps this function should not take the local and global sections as
4720: input and should just obtain them from the `DM`? Plus PETSc creation functions return the thing
4721: they create, this returns nothing
4723: .seealso: [](ch_dmbase), `DM`, `DMGetSectionSF()`, `DMSetSectionSF()`, `DMGetLocalSection()`, `DMGetGlobalSection()`
4724: @*/
4725: PetscErrorCode DMCreateSectionSF(DM dm, PetscSection localSection, PetscSection globalSection)
4726: {
4727: PetscFunctionBegin;
4729: PetscCall(PetscSFSetGraphSection(dm->sectionSF, localSection, globalSection));
4730: PetscFunctionReturn(PETSC_SUCCESS);
4731: }
4733: /*@
4734: DMGetPointSF - Get the `PetscSF` encoding the parallel section point overlap for the `DM`.
4736: Not collective but the resulting `PetscSF` is collective
4738: Input Parameter:
4739: . dm - The `DM`
4741: Output Parameter:
4742: . sf - The `PetscSF`
4744: Level: intermediate
4746: Note:
4747: This gets a borrowed reference, so the user should not destroy this `PetscSF`.
4749: .seealso: [](ch_dmbase), `DM`, `DMSetPointSF()`, `DMGetSectionSF()`, `DMSetSectionSF()`, `DMCreateSectionSF()`
4750: @*/
4751: PetscErrorCode DMGetPointSF(DM dm, PetscSF *sf)
4752: {
4753: PetscFunctionBegin;
4755: PetscAssertPointer(sf, 2);
4756: *sf = dm->sf;
4757: PetscFunctionReturn(PETSC_SUCCESS);
4758: }
4760: /*@
4761: DMSetPointSF - Set the `PetscSF` encoding the parallel section point overlap for the `DM`.
4763: Collective
4765: Input Parameters:
4766: + dm - The `DM`
4767: - sf - The `PetscSF`
4769: Level: intermediate
4771: .seealso: [](ch_dmbase), `DM`, `DMGetPointSF()`, `DMGetSectionSF()`, `DMSetSectionSF()`, `DMCreateSectionSF()`
4772: @*/
4773: PetscErrorCode DMSetPointSF(DM dm, PetscSF sf)
4774: {
4775: PetscFunctionBegin;
4778: PetscCall(PetscObjectReference((PetscObject)sf));
4779: PetscCall(PetscSFDestroy(&dm->sf));
4780: dm->sf = sf;
4781: PetscFunctionReturn(PETSC_SUCCESS);
4782: }
4784: /*@
4785: DMGetNaturalSF - Get the `PetscSF` encoding the map back to the original mesh ordering
4787: Input Parameter:
4788: . dm - The `DM`
4790: Output Parameter:
4791: . sf - The `PetscSF`
4793: Level: intermediate
4795: Note:
4796: This gets a borrowed reference, so the user should not destroy this `PetscSF`.
4798: .seealso: [](ch_dmbase), `DM`, `DMSetNaturalSF()`, `DMSetUseNatural()`, `DMGetUseNatural()`, `DMPlexCreateGlobalToNaturalSF()`, `DMPlexDistribute()`
4799: @*/
4800: PetscErrorCode DMGetNaturalSF(DM dm, PetscSF *sf)
4801: {
4802: PetscFunctionBegin;
4804: PetscAssertPointer(sf, 2);
4805: *sf = dm->sfNatural;
4806: PetscFunctionReturn(PETSC_SUCCESS);
4807: }
4809: /*@
4810: DMSetNaturalSF - Set the PetscSF encoding the map back to the original mesh ordering
4812: Input Parameters:
4813: + dm - The DM
4814: - sf - The PetscSF
4816: Level: intermediate
4818: .seealso: [](ch_dmbase), `DM`, `DMGetNaturalSF()`, `DMSetUseNatural()`, `DMGetUseNatural()`, `DMPlexCreateGlobalToNaturalSF()`, `DMPlexDistribute()`
4819: @*/
4820: PetscErrorCode DMSetNaturalSF(DM dm, PetscSF sf)
4821: {
4822: PetscFunctionBegin;
4825: PetscCall(PetscObjectReference((PetscObject)sf));
4826: PetscCall(PetscSFDestroy(&dm->sfNatural));
4827: dm->sfNatural = sf;
4828: PetscFunctionReturn(PETSC_SUCCESS);
4829: }
4831: static PetscErrorCode DMSetDefaultAdjacency_Private(DM dm, PetscInt f, PetscObject disc)
4832: {
4833: PetscClassId id;
4835: PetscFunctionBegin;
4836: PetscCall(PetscObjectGetClassId(disc, &id));
4837: if (id == PETSCFE_CLASSID) {
4838: PetscCall(DMSetAdjacency(dm, f, PETSC_FALSE, PETSC_TRUE));
4839: } else if (id == PETSCFV_CLASSID) {
4840: PetscCall(DMSetAdjacency(dm, f, PETSC_TRUE, PETSC_FALSE));
4841: } else {
4842: PetscCall(DMSetAdjacency(dm, f, PETSC_FALSE, PETSC_TRUE));
4843: }
4844: PetscFunctionReturn(PETSC_SUCCESS);
4845: }
4847: static PetscErrorCode DMFieldEnlarge_Static(DM dm, PetscInt NfNew)
4848: {
4849: RegionField *tmpr;
4850: PetscInt Nf = dm->Nf, f;
4852: PetscFunctionBegin;
4853: if (Nf >= NfNew) PetscFunctionReturn(PETSC_SUCCESS);
4854: PetscCall(PetscMalloc1(NfNew, &tmpr));
4855: for (f = 0; f < Nf; ++f) tmpr[f] = dm->fields[f];
4856: for (f = Nf; f < NfNew; ++f) {
4857: tmpr[f].disc = NULL;
4858: tmpr[f].label = NULL;
4859: tmpr[f].avoidTensor = PETSC_FALSE;
4860: }
4861: PetscCall(PetscFree(dm->fields));
4862: dm->Nf = NfNew;
4863: dm->fields = tmpr;
4864: PetscFunctionReturn(PETSC_SUCCESS);
4865: }
4867: /*@
4868: DMClearFields - Remove all fields from the `DM`
4870: Logically Collective
4872: Input Parameter:
4873: . dm - The `DM`
4875: Level: intermediate
4877: .seealso: [](ch_dmbase), `DM`, `DMGetNumFields()`, `DMSetNumFields()`, `DMSetField()`
4878: @*/
4879: PetscErrorCode DMClearFields(DM dm)
4880: {
4881: PetscInt f;
4883: PetscFunctionBegin;
4885: for (f = 0; f < dm->Nf; ++f) {
4886: PetscCall(PetscObjectDestroy(&dm->fields[f].disc));
4887: PetscCall(DMLabelDestroy(&dm->fields[f].label));
4888: }
4889: PetscCall(PetscFree(dm->fields));
4890: dm->fields = NULL;
4891: dm->Nf = 0;
4892: PetscFunctionReturn(PETSC_SUCCESS);
4893: }
4895: /*@
4896: DMGetNumFields - Get the number of fields in the `DM`
4898: Not Collective
4900: Input Parameter:
4901: . dm - The `DM`
4903: Output Parameter:
4904: . numFields - The number of fields
4906: Level: intermediate
4908: .seealso: [](ch_dmbase), `DM`, `DMSetNumFields()`, `DMSetField()`
4909: @*/
4910: PetscErrorCode DMGetNumFields(DM dm, PetscInt *numFields)
4911: {
4912: PetscFunctionBegin;
4914: PetscAssertPointer(numFields, 2);
4915: *numFields = dm->Nf;
4916: PetscFunctionReturn(PETSC_SUCCESS);
4917: }
4919: /*@
4920: DMSetNumFields - Set the number of fields in the `DM`
4922: Logically Collective
4924: Input Parameters:
4925: + dm - The `DM`
4926: - numFields - The number of fields
4928: Level: intermediate
4930: .seealso: [](ch_dmbase), `DM`, `DMGetNumFields()`, `DMSetField()`
4931: @*/
4932: PetscErrorCode DMSetNumFields(DM dm, PetscInt numFields)
4933: {
4934: PetscInt Nf, f;
4936: PetscFunctionBegin;
4938: PetscCall(DMGetNumFields(dm, &Nf));
4939: for (f = Nf; f < numFields; ++f) {
4940: PetscContainer obj;
4942: PetscCall(PetscContainerCreate(PetscObjectComm((PetscObject)dm), &obj));
4943: PetscCall(DMAddField(dm, NULL, (PetscObject)obj));
4944: PetscCall(PetscContainerDestroy(&obj));
4945: }
4946: PetscFunctionReturn(PETSC_SUCCESS);
4947: }
4949: /*@
4950: DMGetField - Return the `DMLabel` and discretization object for a given `DM` field
4952: Not Collective
4954: Input Parameters:
4955: + dm - The `DM`
4956: - f - The field number
4958: Output Parameters:
4959: + label - The label indicating the support of the field, or `NULL` for the entire mesh (pass in `NULL` if not needed)
4960: - disc - The discretization object (pass in `NULL` if not needed)
4962: Level: intermediate
4964: .seealso: [](ch_dmbase), `DM`, `DMAddField()`, `DMSetField()`
4965: @*/
4966: PetscErrorCode DMGetField(DM dm, PetscInt f, DMLabel *label, PetscObject *disc)
4967: {
4968: PetscFunctionBegin;
4970: PetscAssertPointer(disc, 4);
4971: PetscCheck((f >= 0) && (f < dm->Nf), PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "Field number %" PetscInt_FMT " must be in [0, %" PetscInt_FMT ")", f, dm->Nf);
4972: if (label) *label = dm->fields[f].label;
4973: if (disc) *disc = dm->fields[f].disc;
4974: PetscFunctionReturn(PETSC_SUCCESS);
4975: }
4977: /* Does not clear the DS */
4978: PetscErrorCode DMSetField_Internal(DM dm, PetscInt f, DMLabel label, PetscObject disc)
4979: {
4980: PetscFunctionBegin;
4981: PetscCall(DMFieldEnlarge_Static(dm, f + 1));
4982: PetscCall(DMLabelDestroy(&dm->fields[f].label));
4983: PetscCall(PetscObjectDestroy(&dm->fields[f].disc));
4984: dm->fields[f].label = label;
4985: dm->fields[f].disc = disc;
4986: PetscCall(PetscObjectReference((PetscObject)label));
4987: PetscCall(PetscObjectReference(disc));
4988: PetscFunctionReturn(PETSC_SUCCESS);
4989: }
4991: /*@
4992: DMSetField - Set the discretization object for a given `DM` field. Usually one would call `DMAddField()` which automatically handles
4993: the field numbering.
4995: Logically Collective
4997: Input Parameters:
4998: + dm - The `DM`
4999: . f - The field number
5000: . label - The label indicating the support of the field, or `NULL` for the entire mesh
5001: - disc - The discretization object
5003: Level: intermediate
5005: .seealso: [](ch_dmbase), `DM`, `DMAddField()`, `DMGetField()`
5006: @*/
5007: PetscErrorCode DMSetField(DM dm, PetscInt f, DMLabel label, PetscObject disc)
5008: {
5009: PetscFunctionBegin;
5013: PetscCheck(f >= 0, PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "Field number %" PetscInt_FMT " must be non-negative", f);
5014: PetscCall(DMSetField_Internal(dm, f, label, disc));
5015: PetscCall(DMSetDefaultAdjacency_Private(dm, f, disc));
5016: PetscCall(DMClearDS(dm));
5017: PetscFunctionReturn(PETSC_SUCCESS);
5018: }
5020: /*@
5021: DMAddField - Add a field to a `DM` object. A field is a function space defined by of a set of discretization points (geometric entities)
5022: and a discretization object that defines the function space associated with those points.
5024: Logically Collective
5026: Input Parameters:
5027: + dm - The `DM`
5028: . label - The label indicating the support of the field, or `NULL` for the entire mesh
5029: - disc - The discretization object
5031: Level: intermediate
5033: Notes:
5034: The label already exists or will be added to the `DM` with `DMSetLabel()`.
5036: For example, a piecewise continuous pressure field can be defined by coefficients at the cell centers of a mesh and piecewise constant functions
5037: within each cell. Thus a specific function in the space is defined by the combination of a `Vec` containing the coefficients, a `DM` defining the
5038: geometry entities, a `DMLabel` indicating a subset of those geometric entities, and a discretization object, such as a `PetscFE`.
5040: .seealso: [](ch_dmbase), `DM`, `DMSetLabel()`, `DMSetField()`, `DMGetField()`, `PetscFE`
5041: @*/
5042: PetscErrorCode DMAddField(DM dm, DMLabel label, PetscObject disc)
5043: {
5044: PetscInt Nf = dm->Nf;
5046: PetscFunctionBegin;
5050: PetscCall(DMFieldEnlarge_Static(dm, Nf + 1));
5051: dm->fields[Nf].label = label;
5052: dm->fields[Nf].disc = disc;
5053: PetscCall(PetscObjectReference((PetscObject)label));
5054: PetscCall(PetscObjectReference(disc));
5055: PetscCall(DMSetDefaultAdjacency_Private(dm, Nf, disc));
5056: PetscCall(DMClearDS(dm));
5057: PetscFunctionReturn(PETSC_SUCCESS);
5058: }
5060: /*@
5061: DMSetFieldAvoidTensor - Set flag to avoid defining the field on tensor cells
5063: Logically Collective
5065: Input Parameters:
5066: + dm - The `DM`
5067: . f - The field index
5068: - avoidTensor - `PETSC_TRUE` to skip defining the field on tensor cells
5070: Level: intermediate
5072: .seealso: [](ch_dmbase), `DM`, `DMGetFieldAvoidTensor()`, `DMSetField()`, `DMGetField()`
5073: @*/
5074: PetscErrorCode DMSetFieldAvoidTensor(DM dm, PetscInt f, PetscBool avoidTensor)
5075: {
5076: PetscFunctionBegin;
5077: PetscCheck((f >= 0) && (f < dm->Nf), PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_OUTOFRANGE, "Field %" PetscInt_FMT " is not in [0, %" PetscInt_FMT ")", f, dm->Nf);
5078: dm->fields[f].avoidTensor = avoidTensor;
5079: PetscFunctionReturn(PETSC_SUCCESS);
5080: }
5082: /*@
5083: DMGetFieldAvoidTensor - Get flag to avoid defining the field on tensor cells
5085: Not Collective
5087: Input Parameters:
5088: + dm - The `DM`
5089: - f - The field index
5091: Output Parameter:
5092: . avoidTensor - The flag to avoid defining the field on tensor cells
5094: Level: intermediate
5096: .seealso: [](ch_dmbase), `DM`, `DMAddField()`, `DMSetField()`, `DMGetField()`, `DMSetFieldAvoidTensor()`
5097: @*/
5098: PetscErrorCode DMGetFieldAvoidTensor(DM dm, PetscInt f, PetscBool *avoidTensor)
5099: {
5100: PetscFunctionBegin;
5101: PetscCheck((f >= 0) && (f < dm->Nf), PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_OUTOFRANGE, "Field %" PetscInt_FMT " is not in [0, %" PetscInt_FMT ")", f, dm->Nf);
5102: *avoidTensor = dm->fields[f].avoidTensor;
5103: PetscFunctionReturn(PETSC_SUCCESS);
5104: }
5106: /*@
5107: DMCopyFields - Copy the discretizations for the `DM` into another `DM`
5109: Collective
5111: Input Parameters:
5112: + dm - The `DM`
5113: . minDegree - Minimum degree for a discretization, or `PETSC_DETERMINE` for no limit
5114: - maxDegree - Maximum degree for a discretization, or `PETSC_DETERMINE` for no limit
5116: Output Parameter:
5117: . newdm - The `DM`
5119: Level: advanced
5121: .seealso: [](ch_dmbase), `DM`, `DMGetField()`, `DMSetField()`, `DMAddField()`, `DMCopyDS()`, `DMGetDS()`, `DMGetCellDS()`
5122: @*/
5123: PetscErrorCode DMCopyFields(DM dm, PetscInt minDegree, PetscInt maxDegree, DM newdm)
5124: {
5125: PetscInt Nf, f;
5127: PetscFunctionBegin;
5128: if (dm == newdm) PetscFunctionReturn(PETSC_SUCCESS);
5129: PetscCall(DMGetNumFields(dm, &Nf));
5130: PetscCall(DMClearFields(newdm));
5131: for (f = 0; f < Nf; ++f) {
5132: DMLabel label;
5133: PetscObject field;
5134: PetscClassId id;
5135: PetscBool useCone, useClosure;
5137: PetscCall(DMGetField(dm, f, &label, &field));
5138: PetscCall(PetscObjectGetClassId(field, &id));
5139: if (id == PETSCFE_CLASSID) {
5140: PetscFE newfe;
5142: PetscCall(PetscFELimitDegree((PetscFE)field, minDegree, maxDegree, &newfe));
5143: PetscCall(DMSetField(newdm, f, label, (PetscObject)newfe));
5144: PetscCall(PetscFEDestroy(&newfe));
5145: } else {
5146: PetscCall(DMSetField(newdm, f, label, field));
5147: }
5148: PetscCall(DMGetAdjacency(dm, f, &useCone, &useClosure));
5149: PetscCall(DMSetAdjacency(newdm, f, useCone, useClosure));
5150: }
5151: PetscFunctionReturn(PETSC_SUCCESS);
5152: }
5154: /*@
5155: DMGetAdjacency - Returns the flags for determining variable influence
5157: Not Collective
5159: Input Parameters:
5160: + dm - The `DM` object
5161: - f - The field number, or `PETSC_DEFAULT` for the default adjacency
5163: Output Parameters:
5164: + useCone - Flag for variable influence starting with the cone operation
5165: - useClosure - Flag for variable influence using transitive closure
5167: Level: developer
5169: Notes:
5170: .vb
5171: FEM: Two points p and q are adjacent if q \in closure(star(p)), useCone = PETSC_FALSE, useClosure = PETSC_TRUE
5172: FVM: Two points p and q are adjacent if q \in support(p+cone(p)), useCone = PETSC_TRUE, useClosure = PETSC_FALSE
5173: FVM++: Two points p and q are adjacent if q \in star(closure(p)), useCone = PETSC_TRUE, useClosure = PETSC_TRUE
5174: .ve
5175: Further explanation can be found in the User's Manual Section on the Influence of Variables on One Another.
5177: .seealso: [](ch_dmbase), `DM`, `DMSetAdjacency()`, `DMGetField()`, `DMSetField()`
5178: @*/
5179: PetscErrorCode DMGetAdjacency(DM dm, PetscInt f, PetscBool *useCone, PetscBool *useClosure)
5180: {
5181: PetscFunctionBegin;
5183: if (useCone) PetscAssertPointer(useCone, 3);
5184: if (useClosure) PetscAssertPointer(useClosure, 4);
5185: if (f < 0) {
5186: if (useCone) *useCone = dm->adjacency[0];
5187: if (useClosure) *useClosure = dm->adjacency[1];
5188: } else {
5189: PetscInt Nf;
5191: PetscCall(DMGetNumFields(dm, &Nf));
5192: PetscCheck(f < Nf, PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "Field number %" PetscInt_FMT " must be in [0, %" PetscInt_FMT ")", f, Nf);
5193: if (useCone) *useCone = dm->fields[f].adjacency[0];
5194: if (useClosure) *useClosure = dm->fields[f].adjacency[1];
5195: }
5196: PetscFunctionReturn(PETSC_SUCCESS);
5197: }
5199: /*@
5200: DMSetAdjacency - Set the flags for determining variable influence
5202: Not Collective
5204: Input Parameters:
5205: + dm - The `DM` object
5206: . f - The field number
5207: . useCone - Flag for variable influence starting with the cone operation
5208: - useClosure - Flag for variable influence using transitive closure
5210: Level: developer
5212: Notes:
5213: .vb
5214: FEM: Two points p and q are adjacent if q \in closure(star(p)), useCone = PETSC_FALSE, useClosure = PETSC_TRUE
5215: FVM: Two points p and q are adjacent if q \in support(p+cone(p)), useCone = PETSC_TRUE, useClosure = PETSC_FALSE
5216: FVM++: Two points p and q are adjacent if q \in star(closure(p)), useCone = PETSC_TRUE, useClosure = PETSC_TRUE
5217: .ve
5218: Further explanation can be found in the User's Manual Section on the Influence of Variables on One Another.
5220: .seealso: [](ch_dmbase), `DM`, `DMGetAdjacency()`, `DMGetField()`, `DMSetField()`
5221: @*/
5222: PetscErrorCode DMSetAdjacency(DM dm, PetscInt f, PetscBool useCone, PetscBool useClosure)
5223: {
5224: PetscFunctionBegin;
5226: if (f < 0) {
5227: dm->adjacency[0] = useCone;
5228: dm->adjacency[1] = useClosure;
5229: } else {
5230: PetscInt Nf;
5232: PetscCall(DMGetNumFields(dm, &Nf));
5233: PetscCheck(f < Nf, PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "Field number %" PetscInt_FMT " must be in [0, %" PetscInt_FMT ")", f, Nf);
5234: dm->fields[f].adjacency[0] = useCone;
5235: dm->fields[f].adjacency[1] = useClosure;
5236: }
5237: PetscFunctionReturn(PETSC_SUCCESS);
5238: }
5240: /*@
5241: DMGetBasicAdjacency - Returns the flags for determining variable influence, using either the default or field 0 if it is defined
5243: Not collective
5245: Input Parameter:
5246: . dm - The `DM` object
5248: Output Parameters:
5249: + useCone - Flag for variable influence starting with the cone operation
5250: - useClosure - Flag for variable influence using transitive closure
5252: Level: developer
5254: Notes:
5255: .vb
5256: FEM: Two points p and q are adjacent if q \in closure(star(p)), useCone = PETSC_FALSE, useClosure = PETSC_TRUE
5257: FVM: Two points p and q are adjacent if q \in support(p+cone(p)), useCone = PETSC_TRUE, useClosure = PETSC_FALSE
5258: FVM++: Two points p and q are adjacent if q \in star(closure(p)), useCone = PETSC_TRUE, useClosure = PETSC_TRUE
5259: .ve
5261: .seealso: [](ch_dmbase), `DM`, `DMSetBasicAdjacency()`, `DMGetField()`, `DMSetField()`
5262: @*/
5263: PetscErrorCode DMGetBasicAdjacency(DM dm, PetscBool *useCone, PetscBool *useClosure)
5264: {
5265: PetscInt Nf;
5267: PetscFunctionBegin;
5269: if (useCone) PetscAssertPointer(useCone, 2);
5270: if (useClosure) PetscAssertPointer(useClosure, 3);
5271: PetscCall(DMGetNumFields(dm, &Nf));
5272: if (!Nf) {
5273: PetscCall(DMGetAdjacency(dm, PETSC_DEFAULT, useCone, useClosure));
5274: } else {
5275: PetscCall(DMGetAdjacency(dm, 0, useCone, useClosure));
5276: }
5277: PetscFunctionReturn(PETSC_SUCCESS);
5278: }
5280: /*@
5281: DMSetBasicAdjacency - Set the flags for determining variable influence, using either the default or field 0 if it is defined
5283: Not Collective
5285: Input Parameters:
5286: + dm - The `DM` object
5287: . useCone - Flag for variable influence starting with the cone operation
5288: - useClosure - Flag for variable influence using transitive closure
5290: Level: developer
5292: Notes:
5293: .vb
5294: FEM: Two points p and q are adjacent if q \in closure(star(p)), useCone = PETSC_FALSE, useClosure = PETSC_TRUE
5295: FVM: Two points p and q are adjacent if q \in support(p+cone(p)), useCone = PETSC_TRUE, useClosure = PETSC_FALSE
5296: FVM++: Two points p and q are adjacent if q \in star(closure(p)), useCone = PETSC_TRUE, useClosure = PETSC_TRUE
5297: .ve
5299: .seealso: [](ch_dmbase), `DM`, `DMGetBasicAdjacency()`, `DMGetField()`, `DMSetField()`
5300: @*/
5301: PetscErrorCode DMSetBasicAdjacency(DM dm, PetscBool useCone, PetscBool useClosure)
5302: {
5303: PetscInt Nf;
5305: PetscFunctionBegin;
5307: PetscCall(DMGetNumFields(dm, &Nf));
5308: if (!Nf) {
5309: PetscCall(DMSetAdjacency(dm, PETSC_DEFAULT, useCone, useClosure));
5310: } else {
5311: PetscCall(DMSetAdjacency(dm, 0, useCone, useClosure));
5312: }
5313: PetscFunctionReturn(PETSC_SUCCESS);
5314: }
5316: PetscErrorCode DMCompleteBCLabels_Internal(DM dm)
5317: {
5318: DM plex;
5319: DMLabel *labels, *glabels;
5320: const char **names;
5321: char *sendNames, *recvNames;
5322: PetscInt Nds, s, maxLabels = 0, maxLen = 0, gmaxLen, Nl = 0, gNl, l, gl, m;
5323: size_t len;
5324: MPI_Comm comm;
5325: PetscMPIInt rank, size, p, *counts, *displs;
5327: PetscFunctionBegin;
5328: PetscCall(PetscObjectGetComm((PetscObject)dm, &comm));
5329: PetscCallMPI(MPI_Comm_size(comm, &size));
5330: PetscCallMPI(MPI_Comm_rank(comm, &rank));
5331: PetscCall(DMGetNumDS(dm, &Nds));
5332: for (s = 0; s < Nds; ++s) {
5333: PetscDS dsBC;
5334: PetscInt numBd;
5336: PetscCall(DMGetRegionNumDS(dm, s, NULL, NULL, &dsBC, NULL));
5337: PetscCall(PetscDSGetNumBoundary(dsBC, &numBd));
5338: maxLabels += numBd;
5339: }
5340: PetscCall(PetscCalloc1(maxLabels, &labels));
5341: /* Get list of labels to be completed */
5342: for (s = 0; s < Nds; ++s) {
5343: PetscDS dsBC;
5344: PetscInt numBd, bd;
5346: PetscCall(DMGetRegionNumDS(dm, s, NULL, NULL, &dsBC, NULL));
5347: PetscCall(PetscDSGetNumBoundary(dsBC, &numBd));
5348: for (bd = 0; bd < numBd; ++bd) {
5349: DMLabel label;
5350: PetscInt field;
5351: PetscObject obj;
5352: PetscClassId id;
5354: PetscCall(PetscDSGetBoundary(dsBC, bd, NULL, NULL, NULL, &label, NULL, NULL, &field, NULL, NULL, NULL, NULL, NULL));
5355: PetscCall(DMGetField(dm, field, NULL, &obj));
5356: PetscCall(PetscObjectGetClassId(obj, &id));
5357: if (!(id == PETSCFE_CLASSID) || !label) continue;
5358: for (l = 0; l < Nl; ++l)
5359: if (labels[l] == label) break;
5360: if (l == Nl) labels[Nl++] = label;
5361: }
5362: }
5363: /* Get label names */
5364: PetscCall(PetscMalloc1(Nl, &names));
5365: for (l = 0; l < Nl; ++l) PetscCall(PetscObjectGetName((PetscObject)labels[l], &names[l]));
5366: for (l = 0; l < Nl; ++l) {
5367: PetscCall(PetscStrlen(names[l], &len));
5368: maxLen = PetscMax(maxLen, (PetscInt)len + 2);
5369: }
5370: PetscCall(PetscFree(labels));
5371: PetscCallMPI(MPIU_Allreduce(&maxLen, &gmaxLen, 1, MPIU_INT, MPI_MAX, comm));
5372: PetscCall(PetscCalloc1(Nl * gmaxLen, &sendNames));
5373: for (l = 0; l < Nl; ++l) PetscCall(PetscStrncpy(&sendNames[gmaxLen * l], names[l], gmaxLen));
5374: PetscCall(PetscFree(names));
5375: /* Put all names on all processes */
5376: PetscCall(PetscCalloc2(size, &counts, size + 1, &displs));
5377: PetscCallMPI(MPI_Allgather(&Nl, 1, MPI_INT, counts, 1, MPI_INT, comm));
5378: for (p = 0; p < size; ++p) displs[p + 1] = displs[p] + counts[p];
5379: gNl = displs[size];
5380: for (p = 0; p < size; ++p) {
5381: counts[p] *= gmaxLen;
5382: displs[p] *= gmaxLen;
5383: }
5384: PetscCall(PetscCalloc2(gNl * gmaxLen, &recvNames, gNl, &glabels));
5385: PetscCallMPI(MPI_Allgatherv(sendNames, counts[rank], MPI_CHAR, recvNames, counts, displs, MPI_CHAR, comm));
5386: PetscCall(PetscFree2(counts, displs));
5387: PetscCall(PetscFree(sendNames));
5388: for (l = 0, gl = 0; l < gNl; ++l) {
5389: PetscCall(DMGetLabel(dm, &recvNames[l * gmaxLen], &glabels[gl]));
5390: PetscCheck(glabels[gl], PETSC_COMM_SELF, PETSC_ERR_ARG_WRONGSTATE, "Label %s missing on rank %d", &recvNames[l * gmaxLen], rank);
5391: for (m = 0; m < gl; ++m)
5392: if (glabels[m] == glabels[gl]) goto next_label;
5393: PetscCall(DMConvert(dm, DMPLEX, &plex));
5394: PetscCall(DMPlexLabelComplete(plex, glabels[gl]));
5395: PetscCall(DMDestroy(&plex));
5396: ++gl;
5397: next_label:
5398: continue;
5399: }
5400: PetscCall(PetscFree2(recvNames, glabels));
5401: PetscFunctionReturn(PETSC_SUCCESS);
5402: }
5404: static PetscErrorCode DMDSEnlarge_Static(DM dm, PetscInt NdsNew)
5405: {
5406: DMSpace *tmpd;
5407: PetscInt Nds = dm->Nds, s;
5409: PetscFunctionBegin;
5410: if (Nds >= NdsNew) PetscFunctionReturn(PETSC_SUCCESS);
5411: PetscCall(PetscMalloc1(NdsNew, &tmpd));
5412: for (s = 0; s < Nds; ++s) tmpd[s] = dm->probs[s];
5413: for (s = Nds; s < NdsNew; ++s) {
5414: tmpd[s].ds = NULL;
5415: tmpd[s].label = NULL;
5416: tmpd[s].fields = NULL;
5417: }
5418: PetscCall(PetscFree(dm->probs));
5419: dm->Nds = NdsNew;
5420: dm->probs = tmpd;
5421: PetscFunctionReturn(PETSC_SUCCESS);
5422: }
5424: /*@
5425: DMGetNumDS - Get the number of discrete systems in the `DM`
5427: Not Collective
5429: Input Parameter:
5430: . dm - The `DM`
5432: Output Parameter:
5433: . Nds - The number of `PetscDS` objects
5435: Level: intermediate
5437: .seealso: [](ch_dmbase), `DM`, `DMGetDS()`, `DMGetCellDS()`
5438: @*/
5439: PetscErrorCode DMGetNumDS(DM dm, PetscInt *Nds)
5440: {
5441: PetscFunctionBegin;
5443: PetscAssertPointer(Nds, 2);
5444: *Nds = dm->Nds;
5445: PetscFunctionReturn(PETSC_SUCCESS);
5446: }
5448: /*@
5449: DMClearDS - Remove all discrete systems from the `DM`
5451: Logically Collective
5453: Input Parameter:
5454: . dm - The `DM`
5456: Level: intermediate
5458: .seealso: [](ch_dmbase), `DM`, `DMGetNumDS()`, `DMGetDS()`, `DMSetField()`
5459: @*/
5460: PetscErrorCode DMClearDS(DM dm)
5461: {
5462: PetscInt s;
5464: PetscFunctionBegin;
5466: for (s = 0; s < dm->Nds; ++s) {
5467: PetscCall(PetscDSDestroy(&dm->probs[s].ds));
5468: PetscCall(PetscDSDestroy(&dm->probs[s].dsIn));
5469: PetscCall(DMLabelDestroy(&dm->probs[s].label));
5470: PetscCall(ISDestroy(&dm->probs[s].fields));
5471: }
5472: PetscCall(PetscFree(dm->probs));
5473: dm->probs = NULL;
5474: dm->Nds = 0;
5475: PetscFunctionReturn(PETSC_SUCCESS);
5476: }
5478: /*@
5479: DMGetDS - Get the default `PetscDS`
5481: Not Collective
5483: Input Parameter:
5484: . dm - The `DM`
5486: Output Parameter:
5487: . ds - The default `PetscDS`
5489: Level: intermediate
5491: .seealso: [](ch_dmbase), `DM`, `DMGetCellDS()`, `DMGetRegionDS()`
5492: @*/
5493: PetscErrorCode DMGetDS(DM dm, PetscDS *ds)
5494: {
5495: PetscFunctionBeginHot;
5497: PetscAssertPointer(ds, 2);
5498: PetscCheck(dm->Nds > 0, PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_WRONGSTATE, "Need to call DMCreateDS() before calling DMGetDS()");
5499: *ds = dm->probs[0].ds;
5500: PetscFunctionReturn(PETSC_SUCCESS);
5501: }
5503: /*@
5504: DMGetCellDS - Get the `PetscDS` defined on a given cell
5506: Not Collective
5508: Input Parameters:
5509: + dm - The `DM`
5510: - point - Cell for the `PetscDS`
5512: Output Parameters:
5513: + ds - The `PetscDS` defined on the given cell
5514: - dsIn - The `PetscDS` for input on the given cell, or NULL if the same ds
5516: Level: developer
5518: .seealso: [](ch_dmbase), `DM`, `DMGetDS()`, `DMSetRegionDS()`
5519: @*/
5520: PetscErrorCode DMGetCellDS(DM dm, PetscInt point, PetscDS *ds, PetscDS *dsIn)
5521: {
5522: PetscDS dsDef = NULL;
5523: PetscInt s;
5525: PetscFunctionBeginHot;
5527: if (ds) PetscAssertPointer(ds, 3);
5528: if (dsIn) PetscAssertPointer(dsIn, 4);
5529: PetscCheck(point >= 0, PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "Mesh point cannot be negative: %" PetscInt_FMT, point);
5530: if (ds) *ds = NULL;
5531: if (dsIn) *dsIn = NULL;
5532: for (s = 0; s < dm->Nds; ++s) {
5533: PetscInt val;
5535: if (!dm->probs[s].label) {
5536: dsDef = dm->probs[s].ds;
5537: } else {
5538: PetscCall(DMLabelGetValue(dm->probs[s].label, point, &val));
5539: if (val >= 0) {
5540: if (ds) *ds = dm->probs[s].ds;
5541: if (dsIn) *dsIn = dm->probs[s].dsIn;
5542: break;
5543: }
5544: }
5545: }
5546: if (ds && !*ds) *ds = dsDef;
5547: PetscFunctionReturn(PETSC_SUCCESS);
5548: }
5550: /*@
5551: DMGetRegionDS - Get the `PetscDS` for a given mesh region, defined by a `DMLabel`
5553: Not Collective
5555: Input Parameters:
5556: + dm - The `DM`
5557: - label - The `DMLabel` defining the mesh region, or `NULL` for the entire mesh
5559: Output Parameters:
5560: + fields - The `IS` containing the `DM` field numbers for the fields in this `PetscDS`, or `NULL`
5561: . ds - The `PetscDS` defined on the given region, or `NULL`
5562: - dsIn - The `PetscDS` for input in the given region, or `NULL`
5564: Level: advanced
5566: Note:
5567: If a non-`NULL` label is given, but there is no `PetscDS` on that specific label,
5568: the `PetscDS` for the full domain (if present) is returned. Returns with
5569: fields = `NULL` and ds = `NULL` if there is no `PetscDS` for the full domain.
5571: .seealso: [](ch_dmbase), `DM`, `DMGetRegionNumDS()`, `DMSetRegionDS()`, `DMGetDS()`, `DMGetCellDS()`
5572: @*/
5573: PetscErrorCode DMGetRegionDS(DM dm, DMLabel label, IS *fields, PetscDS *ds, PetscDS *dsIn)
5574: {
5575: PetscInt Nds = dm->Nds, s;
5577: PetscFunctionBegin;
5580: if (fields) {
5581: PetscAssertPointer(fields, 3);
5582: *fields = NULL;
5583: }
5584: if (ds) {
5585: PetscAssertPointer(ds, 4);
5586: *ds = NULL;
5587: }
5588: if (dsIn) {
5589: PetscAssertPointer(dsIn, 5);
5590: *dsIn = NULL;
5591: }
5592: for (s = 0; s < Nds; ++s) {
5593: if (dm->probs[s].label == label || !dm->probs[s].label) {
5594: if (fields) *fields = dm->probs[s].fields;
5595: if (ds) *ds = dm->probs[s].ds;
5596: if (dsIn) *dsIn = dm->probs[s].dsIn;
5597: if (dm->probs[s].label) PetscFunctionReturn(PETSC_SUCCESS);
5598: }
5599: }
5600: PetscFunctionReturn(PETSC_SUCCESS);
5601: }
5603: /*@
5604: DMSetRegionDS - Set the `PetscDS` for a given mesh region, defined by a `DMLabel`
5606: Collective
5608: Input Parameters:
5609: + dm - The `DM`
5610: . label - The `DMLabel` defining the mesh region, or `NULL` for the entire mesh
5611: . fields - The `IS` containing the `DM` field numbers for the fields in this `PetscDS`, or `NULL` for all fields
5612: . ds - The `PetscDS` defined on the given region
5613: - dsIn - The `PetscDS` for input on the given cell, or `NULL` if it is the same `PetscDS`
5615: Level: advanced
5617: Note:
5618: If the label has a `PetscDS` defined, it will be replaced. Otherwise, it will be added to the `DM`. If the `PetscDS` is replaced,
5619: the fields argument is ignored.
5621: .seealso: [](ch_dmbase), `DM`, `DMGetRegionDS()`, `DMSetRegionNumDS()`, `DMGetDS()`, `DMGetCellDS()`
5622: @*/
5623: PetscErrorCode DMSetRegionDS(DM dm, DMLabel label, IS fields, PetscDS ds, PetscDS dsIn)
5624: {
5625: PetscInt Nds = dm->Nds, s;
5627: PetscFunctionBegin;
5633: for (s = 0; s < Nds; ++s) {
5634: if (dm->probs[s].label == label) {
5635: PetscCall(PetscDSDestroy(&dm->probs[s].ds));
5636: PetscCall(PetscDSDestroy(&dm->probs[s].dsIn));
5637: dm->probs[s].ds = ds;
5638: dm->probs[s].dsIn = dsIn;
5639: PetscFunctionReturn(PETSC_SUCCESS);
5640: }
5641: }
5642: PetscCall(DMDSEnlarge_Static(dm, Nds + 1));
5643: PetscCall(PetscObjectReference((PetscObject)label));
5644: PetscCall(PetscObjectReference((PetscObject)fields));
5645: PetscCall(PetscObjectReference((PetscObject)ds));
5646: PetscCall(PetscObjectReference((PetscObject)dsIn));
5647: if (!label) {
5648: /* Put the NULL label at the front, so it is returned as the default */
5649: for (s = Nds - 1; s >= 0; --s) dm->probs[s + 1] = dm->probs[s];
5650: Nds = 0;
5651: }
5652: dm->probs[Nds].label = label;
5653: dm->probs[Nds].fields = fields;
5654: dm->probs[Nds].ds = ds;
5655: dm->probs[Nds].dsIn = dsIn;
5656: PetscFunctionReturn(PETSC_SUCCESS);
5657: }
5659: /*@
5660: DMGetRegionNumDS - Get the `PetscDS` for a given mesh region, defined by the region number
5662: Not Collective
5664: Input Parameters:
5665: + dm - The `DM`
5666: - num - The region number, in [0, Nds)
5668: Output Parameters:
5669: + label - The region label, or `NULL`
5670: . fields - The `IS` containing the `DM` field numbers for the fields in this `PetscDS`, or `NULL`
5671: . ds - The `PetscDS` defined on the given region, or `NULL`
5672: - dsIn - The `PetscDS` for input in the given region, or `NULL`
5674: Level: advanced
5676: .seealso: [](ch_dmbase), `DM`, `DMGetRegionDS()`, `DMSetRegionDS()`, `DMGetDS()`, `DMGetCellDS()`
5677: @*/
5678: PetscErrorCode DMGetRegionNumDS(DM dm, PetscInt num, DMLabel *label, IS *fields, PetscDS *ds, PetscDS *dsIn)
5679: {
5680: PetscInt Nds;
5682: PetscFunctionBegin;
5684: PetscCall(DMGetNumDS(dm, &Nds));
5685: PetscCheck((num >= 0) && (num < Nds), PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "Region number %" PetscInt_FMT " is not in [0, %" PetscInt_FMT ")", num, Nds);
5686: if (label) {
5687: PetscAssertPointer(label, 3);
5688: *label = dm->probs[num].label;
5689: }
5690: if (fields) {
5691: PetscAssertPointer(fields, 4);
5692: *fields = dm->probs[num].fields;
5693: }
5694: if (ds) {
5695: PetscAssertPointer(ds, 5);
5696: *ds = dm->probs[num].ds;
5697: }
5698: if (dsIn) {
5699: PetscAssertPointer(dsIn, 6);
5700: *dsIn = dm->probs[num].dsIn;
5701: }
5702: PetscFunctionReturn(PETSC_SUCCESS);
5703: }
5705: /*@
5706: DMSetRegionNumDS - Set the `PetscDS` for a given mesh region, defined by the region number
5708: Not Collective
5710: Input Parameters:
5711: + dm - The `DM`
5712: . num - The region number, in [0, Nds)
5713: . label - The region label, or `NULL`
5714: . fields - The `IS` containing the `DM` field numbers for the fields in this `PetscDS`, or `NULL` to prevent setting
5715: . ds - The `PetscDS` defined on the given region, or `NULL` to prevent setting
5716: - dsIn - The `PetscDS` for input on the given cell, or `NULL` if it is the same `PetscDS`
5718: Level: advanced
5720: .seealso: [](ch_dmbase), `DM`, `DMGetRegionDS()`, `DMSetRegionDS()`, `DMGetDS()`, `DMGetCellDS()`
5721: @*/
5722: PetscErrorCode DMSetRegionNumDS(DM dm, PetscInt num, DMLabel label, IS fields, PetscDS ds, PetscDS dsIn)
5723: {
5724: PetscInt Nds;
5726: PetscFunctionBegin;
5729: PetscCall(DMGetNumDS(dm, &Nds));
5730: PetscCheck((num >= 0) && (num < Nds), PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "Region number %" PetscInt_FMT " is not in [0, %" PetscInt_FMT ")", num, Nds);
5731: PetscCall(PetscObjectReference((PetscObject)label));
5732: PetscCall(DMLabelDestroy(&dm->probs[num].label));
5733: dm->probs[num].label = label;
5734: if (fields) {
5736: PetscCall(PetscObjectReference((PetscObject)fields));
5737: PetscCall(ISDestroy(&dm->probs[num].fields));
5738: dm->probs[num].fields = fields;
5739: }
5740: if (ds) {
5742: PetscCall(PetscObjectReference((PetscObject)ds));
5743: PetscCall(PetscDSDestroy(&dm->probs[num].ds));
5744: dm->probs[num].ds = ds;
5745: }
5746: if (dsIn) {
5748: PetscCall(PetscObjectReference((PetscObject)dsIn));
5749: PetscCall(PetscDSDestroy(&dm->probs[num].dsIn));
5750: dm->probs[num].dsIn = dsIn;
5751: }
5752: PetscFunctionReturn(PETSC_SUCCESS);
5753: }
5755: /*@
5756: DMFindRegionNum - Find the region number for a given `PetscDS`, or -1 if it is not found.
5758: Not Collective
5760: Input Parameters:
5761: + dm - The `DM`
5762: - ds - The `PetscDS` defined on the given region
5764: Output Parameter:
5765: . num - The region number, in [0, Nds), or -1 if not found
5767: Level: advanced
5769: .seealso: [](ch_dmbase), `DM`, `DMGetRegionNumDS()`, `DMGetRegionDS()`, `DMSetRegionDS()`, `DMGetDS()`, `DMGetCellDS()`
5770: @*/
5771: PetscErrorCode DMFindRegionNum(DM dm, PetscDS ds, PetscInt *num)
5772: {
5773: PetscInt Nds, n;
5775: PetscFunctionBegin;
5778: PetscAssertPointer(num, 3);
5779: PetscCall(DMGetNumDS(dm, &Nds));
5780: for (n = 0; n < Nds; ++n)
5781: if (ds == dm->probs[n].ds) break;
5782: if (n >= Nds) *num = -1;
5783: else *num = n;
5784: PetscFunctionReturn(PETSC_SUCCESS);
5785: }
5787: /*@
5788: DMCreateFEDefault - Create a `PetscFE` based on the celltype for the mesh
5790: Not Collective
5792: Input Parameters:
5793: + dm - The `DM`
5794: . Nc - The number of components for the field
5795: . prefix - The options prefix for the output `PetscFE`, or `NULL`
5796: - qorder - The quadrature order or `PETSC_DETERMINE` to use `PetscSpace` polynomial degree
5798: Output Parameter:
5799: . fem - The `PetscFE`
5801: Level: intermediate
5803: Note:
5804: This is a convenience method that just calls `PetscFECreateByCell()` underneath.
5806: .seealso: [](ch_dmbase), `DM`, `PetscFECreateByCell()`, `DMAddField()`, `DMCreateDS()`, `DMGetCellDS()`, `DMGetRegionDS()`
5807: @*/
5808: PetscErrorCode DMCreateFEDefault(DM dm, PetscInt Nc, const char prefix[], PetscInt qorder, PetscFE *fem)
5809: {
5810: DMPolytopeType ct;
5811: PetscInt dim, cStart;
5813: PetscFunctionBegin;
5816: if (prefix) PetscAssertPointer(prefix, 3);
5818: PetscAssertPointer(fem, 5);
5819: PetscCall(DMGetDimension(dm, &dim));
5820: PetscCall(DMPlexGetHeightStratum(dm, 0, &cStart, NULL));
5821: PetscCall(DMPlexGetCellType(dm, cStart, &ct));
5822: PetscCall(PetscFECreateByCell(PETSC_COMM_SELF, dim, Nc, ct, prefix, qorder, fem));
5823: PetscFunctionReturn(PETSC_SUCCESS);
5824: }
5826: /*@
5827: DMCreateDS - Create the discrete systems for the `DM` based upon the fields added to the `DM`
5829: Collective
5831: Input Parameter:
5832: . dm - The `DM`
5834: Options Database Key:
5835: . -dm_petscds_view - View all the `PetscDS` objects in this `DM`
5837: Level: intermediate
5839: .seealso: [](ch_dmbase), `DM`, `DMSetField`, `DMAddField()`, `DMGetDS()`, `DMGetCellDS()`, `DMGetRegionDS()`, `DMSetRegionDS()`
5840: @*/
5841: PetscErrorCode DMCreateDS(DM dm)
5842: {
5843: MPI_Comm comm;
5844: PetscDS dsDef;
5845: DMLabel *labelSet;
5846: PetscInt dE, Nf = dm->Nf, f, s, Nl, l, Ndef, k;
5847: PetscBool doSetup = PETSC_TRUE, flg;
5849: PetscFunctionBegin;
5851: if (!dm->fields) PetscFunctionReturn(PETSC_SUCCESS);
5852: PetscCall(PetscObjectGetComm((PetscObject)dm, &comm));
5853: PetscCall(DMGetCoordinateDim(dm, &dE));
5854: /* Determine how many regions we have */
5855: PetscCall(PetscMalloc1(Nf, &labelSet));
5856: Nl = 0;
5857: Ndef = 0;
5858: for (f = 0; f < Nf; ++f) {
5859: DMLabel label = dm->fields[f].label;
5860: PetscInt l;
5862: #ifdef PETSC_HAVE_LIBCEED
5863: /* Move CEED context to discretizations */
5864: {
5865: PetscClassId id;
5867: PetscCall(PetscObjectGetClassId(dm->fields[f].disc, &id));
5868: if (id == PETSCFE_CLASSID) {
5869: Ceed ceed;
5871: PetscCall(DMGetCeed(dm, &ceed));
5872: PetscCall(PetscFESetCeed((PetscFE)dm->fields[f].disc, ceed));
5873: }
5874: }
5875: #endif
5876: if (!label) {
5877: ++Ndef;
5878: continue;
5879: }
5880: for (l = 0; l < Nl; ++l)
5881: if (label == labelSet[l]) break;
5882: if (l < Nl) continue;
5883: labelSet[Nl++] = label;
5884: }
5885: /* Create default DS if there are no labels to intersect with */
5886: PetscCall(DMGetRegionDS(dm, NULL, NULL, &dsDef, NULL));
5887: if (!dsDef && Ndef && !Nl) {
5888: IS fields;
5889: PetscInt *fld, nf;
5891: for (f = 0, nf = 0; f < Nf; ++f)
5892: if (!dm->fields[f].label) ++nf;
5893: PetscCheck(nf, comm, PETSC_ERR_PLIB, "All fields have labels, but we are trying to create a default DS");
5894: PetscCall(PetscMalloc1(nf, &fld));
5895: for (f = 0, nf = 0; f < Nf; ++f)
5896: if (!dm->fields[f].label) fld[nf++] = f;
5897: PetscCall(ISCreate(PETSC_COMM_SELF, &fields));
5898: PetscCall(PetscObjectSetOptionsPrefix((PetscObject)fields, "dm_fields_"));
5899: PetscCall(ISSetType(fields, ISGENERAL));
5900: PetscCall(ISGeneralSetIndices(fields, nf, fld, PETSC_OWN_POINTER));
5902: PetscCall(PetscDSCreate(PETSC_COMM_SELF, &dsDef));
5903: PetscCall(DMSetRegionDS(dm, NULL, fields, dsDef, NULL));
5904: PetscCall(PetscDSDestroy(&dsDef));
5905: PetscCall(ISDestroy(&fields));
5906: }
5907: PetscCall(DMGetRegionDS(dm, NULL, NULL, &dsDef, NULL));
5908: if (dsDef) PetscCall(PetscDSSetCoordinateDimension(dsDef, dE));
5909: /* Intersect labels with default fields */
5910: if (Ndef && Nl) {
5911: DM plex;
5912: DMLabel cellLabel;
5913: IS fieldIS, allcellIS, defcellIS = NULL;
5914: PetscInt *fields;
5915: const PetscInt *cells;
5916: PetscInt depth, nf = 0, n, c;
5918: PetscCall(DMConvert(dm, DMPLEX, &plex));
5919: PetscCall(DMPlexGetDepth(plex, &depth));
5920: PetscCall(DMGetStratumIS(plex, "dim", depth, &allcellIS));
5921: if (!allcellIS) PetscCall(DMGetStratumIS(plex, "depth", depth, &allcellIS));
5922: /* TODO This looks like it only works for one label */
5923: for (l = 0; l < Nl; ++l) {
5924: DMLabel label = labelSet[l];
5925: IS pointIS;
5927: PetscCall(ISDestroy(&defcellIS));
5928: PetscCall(DMLabelGetStratumIS(label, 1, &pointIS));
5929: PetscCall(ISDifference(allcellIS, pointIS, &defcellIS));
5930: PetscCall(ISDestroy(&pointIS));
5931: }
5932: PetscCall(ISDestroy(&allcellIS));
5934: PetscCall(DMLabelCreate(PETSC_COMM_SELF, "defaultCells", &cellLabel));
5935: PetscCall(ISGetLocalSize(defcellIS, &n));
5936: PetscCall(ISGetIndices(defcellIS, &cells));
5937: for (c = 0; c < n; ++c) PetscCall(DMLabelSetValue(cellLabel, cells[c], 1));
5938: PetscCall(ISRestoreIndices(defcellIS, &cells));
5939: PetscCall(ISDestroy(&defcellIS));
5940: PetscCall(DMPlexLabelComplete(plex, cellLabel));
5942: PetscCall(PetscMalloc1(Ndef, &fields));
5943: for (f = 0; f < Nf; ++f)
5944: if (!dm->fields[f].label) fields[nf++] = f;
5945: PetscCall(ISCreate(PETSC_COMM_SELF, &fieldIS));
5946: PetscCall(PetscObjectSetOptionsPrefix((PetscObject)fieldIS, "dm_fields_"));
5947: PetscCall(ISSetType(fieldIS, ISGENERAL));
5948: PetscCall(ISGeneralSetIndices(fieldIS, nf, fields, PETSC_OWN_POINTER));
5950: PetscCall(PetscDSCreate(PETSC_COMM_SELF, &dsDef));
5951: PetscCall(DMSetRegionDS(dm, cellLabel, fieldIS, dsDef, NULL));
5952: PetscCall(PetscDSSetCoordinateDimension(dsDef, dE));
5953: PetscCall(DMLabelDestroy(&cellLabel));
5954: PetscCall(PetscDSDestroy(&dsDef));
5955: PetscCall(ISDestroy(&fieldIS));
5956: PetscCall(DMDestroy(&plex));
5957: }
5958: /* Create label DSes
5959: - WE ONLY SUPPORT IDENTICAL OR DISJOINT LABELS
5960: */
5961: /* TODO Should check that labels are disjoint */
5962: for (l = 0; l < Nl; ++l) {
5963: DMLabel label = labelSet[l];
5964: PetscDS ds, dsIn = NULL;
5965: IS fields;
5966: PetscInt *fld, nf;
5968: PetscCall(PetscDSCreate(PETSC_COMM_SELF, &ds));
5969: for (f = 0, nf = 0; f < Nf; ++f)
5970: if (label == dm->fields[f].label || !dm->fields[f].label) ++nf;
5971: PetscCall(PetscMalloc1(nf, &fld));
5972: for (f = 0, nf = 0; f < Nf; ++f)
5973: if (label == dm->fields[f].label || !dm->fields[f].label) fld[nf++] = f;
5974: PetscCall(ISCreate(PETSC_COMM_SELF, &fields));
5975: PetscCall(PetscObjectSetOptionsPrefix((PetscObject)fields, "dm_fields_"));
5976: PetscCall(ISSetType(fields, ISGENERAL));
5977: PetscCall(ISGeneralSetIndices(fields, nf, fld, PETSC_OWN_POINTER));
5978: PetscCall(PetscDSSetCoordinateDimension(ds, dE));
5979: {
5980: DMPolytopeType ct;
5981: PetscInt lStart, lEnd;
5982: PetscBool isCohesiveLocal = PETSC_FALSE, isCohesive;
5984: PetscCall(DMLabelGetBounds(label, &lStart, &lEnd));
5985: if (lStart >= 0) {
5986: PetscCall(DMPlexGetCellType(dm, lStart, &ct));
5987: switch (ct) {
5988: case DM_POLYTOPE_POINT_PRISM_TENSOR:
5989: case DM_POLYTOPE_SEG_PRISM_TENSOR:
5990: case DM_POLYTOPE_TRI_PRISM_TENSOR:
5991: case DM_POLYTOPE_QUAD_PRISM_TENSOR:
5992: isCohesiveLocal = PETSC_TRUE;
5993: break;
5994: default:
5995: break;
5996: }
5997: }
5998: PetscCallMPI(MPIU_Allreduce(&isCohesiveLocal, &isCohesive, 1, MPIU_BOOL, MPI_LOR, comm));
5999: if (isCohesive) {
6000: PetscCall(PetscDSCreate(PETSC_COMM_SELF, &dsIn));
6001: PetscCall(PetscDSSetCoordinateDimension(dsIn, dE));
6002: }
6003: for (f = 0, nf = 0; f < Nf; ++f) {
6004: if (label == dm->fields[f].label || !dm->fields[f].label) {
6005: if (label == dm->fields[f].label) {
6006: PetscCall(PetscDSSetDiscretization(ds, nf, NULL));
6007: PetscCall(PetscDSSetCohesive(ds, nf, isCohesive));
6008: if (dsIn) {
6009: PetscCall(PetscDSSetDiscretization(dsIn, nf, NULL));
6010: PetscCall(PetscDSSetCohesive(dsIn, nf, isCohesive));
6011: }
6012: }
6013: ++nf;
6014: }
6015: }
6016: }
6017: PetscCall(DMSetRegionDS(dm, label, fields, ds, dsIn));
6018: PetscCall(ISDestroy(&fields));
6019: PetscCall(PetscDSDestroy(&ds));
6020: PetscCall(PetscDSDestroy(&dsIn));
6021: }
6022: PetscCall(PetscFree(labelSet));
6023: /* Set fields in DSes */
6024: for (s = 0; s < dm->Nds; ++s) {
6025: PetscDS ds = dm->probs[s].ds;
6026: PetscDS dsIn = dm->probs[s].dsIn;
6027: IS fields = dm->probs[s].fields;
6028: const PetscInt *fld;
6029: PetscInt nf, dsnf;
6030: PetscBool isCohesive;
6032: PetscCall(PetscDSGetNumFields(ds, &dsnf));
6033: PetscCall(PetscDSIsCohesive(ds, &isCohesive));
6034: PetscCall(ISGetLocalSize(fields, &nf));
6035: PetscCall(ISGetIndices(fields, &fld));
6036: for (f = 0; f < nf; ++f) {
6037: PetscObject disc = dm->fields[fld[f]].disc;
6038: PetscBool isCohesiveField;
6039: PetscClassId id;
6041: /* Handle DS with no fields */
6042: if (dsnf) PetscCall(PetscDSGetCohesive(ds, f, &isCohesiveField));
6043: /* If this is a cohesive cell, then regular fields need the lower dimensional discretization */
6044: if (isCohesive) {
6045: if (!isCohesiveField) {
6046: PetscObject bdDisc;
6048: PetscCall(PetscFEGetHeightSubspace((PetscFE)disc, 1, (PetscFE *)&bdDisc));
6049: PetscCall(PetscDSSetDiscretization(ds, f, bdDisc));
6050: PetscCall(PetscDSSetDiscretization(dsIn, f, disc));
6051: } else {
6052: PetscCall(PetscDSSetDiscretization(ds, f, disc));
6053: PetscCall(PetscDSSetDiscretization(dsIn, f, disc));
6054: }
6055: } else {
6056: PetscCall(PetscDSSetDiscretization(ds, f, disc));
6057: }
6058: /* We allow people to have placeholder fields and construct the Section by hand */
6059: PetscCall(PetscObjectGetClassId(disc, &id));
6060: if ((id != PETSCFE_CLASSID) && (id != PETSCFV_CLASSID)) doSetup = PETSC_FALSE;
6061: }
6062: PetscCall(ISRestoreIndices(fields, &fld));
6063: }
6064: /* Allow k-jet tabulation */
6065: PetscCall(PetscOptionsGetInt(NULL, ((PetscObject)dm)->prefix, "-dm_ds_jet_degree", &k, &flg));
6066: if (flg) {
6067: for (s = 0; s < dm->Nds; ++s) {
6068: PetscDS ds = dm->probs[s].ds;
6069: PetscDS dsIn = dm->probs[s].dsIn;
6070: PetscInt Nf, f;
6072: PetscCall(PetscDSGetNumFields(ds, &Nf));
6073: for (f = 0; f < Nf; ++f) {
6074: PetscCall(PetscDSSetJetDegree(ds, f, k));
6075: if (dsIn) PetscCall(PetscDSSetJetDegree(dsIn, f, k));
6076: }
6077: }
6078: }
6079: /* Setup DSes */
6080: if (doSetup) {
6081: for (s = 0; s < dm->Nds; ++s) {
6082: if (dm->setfromoptionscalled) {
6083: PetscCall(PetscDSSetFromOptions(dm->probs[s].ds));
6084: if (dm->probs[s].dsIn) PetscCall(PetscDSSetFromOptions(dm->probs[s].dsIn));
6085: }
6086: PetscCall(PetscDSSetUp(dm->probs[s].ds));
6087: if (dm->probs[s].dsIn) PetscCall(PetscDSSetUp(dm->probs[s].dsIn));
6088: }
6089: }
6090: PetscFunctionReturn(PETSC_SUCCESS);
6091: }
6093: /*@
6094: DMUseTensorOrder - Use a tensor product closure ordering for the default section
6096: Input Parameters:
6097: + dm - The DM
6098: - tensor - Flag for tensor order
6100: Level: developer
6102: .seealso: `DMPlexSetClosurePermutationTensor()`, `PetscSectionResetClosurePermutation()`
6103: @*/
6104: PetscErrorCode DMUseTensorOrder(DM dm, PetscBool tensor)
6105: {
6106: PetscInt Nf;
6107: PetscBool reorder = PETSC_TRUE, isPlex;
6109: PetscFunctionBegin;
6110: PetscCall(PetscObjectTypeCompare((PetscObject)dm, DMPLEX, &isPlex));
6111: PetscCall(DMGetNumFields(dm, &Nf));
6112: for (PetscInt f = 0; f < Nf; ++f) {
6113: PetscObject obj;
6114: PetscClassId id;
6116: PetscCall(DMGetField(dm, f, NULL, &obj));
6117: PetscCall(PetscObjectGetClassId(obj, &id));
6118: if (id == PETSCFE_CLASSID) {
6119: PetscSpace sp;
6120: PetscBool tensor;
6122: PetscCall(PetscFEGetBasisSpace((PetscFE)obj, &sp));
6123: PetscCall(PetscSpacePolynomialGetTensor(sp, &tensor));
6124: reorder = reorder && tensor ? PETSC_TRUE : PETSC_FALSE;
6125: } else reorder = PETSC_FALSE;
6126: }
6127: if (tensor) {
6128: if (reorder && isPlex) PetscCall(DMPlexSetClosurePermutationTensor(dm, PETSC_DETERMINE, NULL));
6129: } else {
6130: PetscSection s;
6132: PetscCall(DMGetLocalSection(dm, &s));
6133: if (s) PetscCall(PetscSectionResetClosurePermutation(s));
6134: }
6135: PetscFunctionReturn(PETSC_SUCCESS);
6136: }
6138: /*@
6139: DMComputeExactSolution - Compute the exact solution for a given `DM`, using the `PetscDS` information.
6141: Collective
6143: Input Parameters:
6144: + dm - The `DM`
6145: - time - The time
6147: Output Parameters:
6148: + u - The vector will be filled with exact solution values, or `NULL`
6149: - u_t - The vector will be filled with the time derivative of exact solution values, or `NULL`
6151: Level: developer
6153: Note:
6154: The user must call `PetscDSSetExactSolution()` before using this routine
6156: .seealso: [](ch_dmbase), `DM`, `PetscDSSetExactSolution()`
6157: @*/
6158: PetscErrorCode DMComputeExactSolution(DM dm, PetscReal time, Vec u, Vec u_t)
6159: {
6160: PetscErrorCode (**exacts)(PetscInt, PetscReal, const PetscReal x[], PetscInt, PetscScalar *u, void *ctx);
6161: void **ectxs;
6162: Vec locu, locu_t;
6163: PetscInt Nf, Nds, s;
6165: PetscFunctionBegin;
6167: if (u) {
6169: PetscCall(DMGetLocalVector(dm, &locu));
6170: PetscCall(VecSet(locu, 0.));
6171: }
6172: if (u_t) {
6174: PetscCall(DMGetLocalVector(dm, &locu_t));
6175: PetscCall(VecSet(locu_t, 0.));
6176: }
6177: PetscCall(DMGetNumFields(dm, &Nf));
6178: PetscCall(PetscMalloc2(Nf, &exacts, Nf, &ectxs));
6179: PetscCall(DMGetNumDS(dm, &Nds));
6180: for (s = 0; s < Nds; ++s) {
6181: PetscDS ds;
6182: DMLabel label;
6183: IS fieldIS;
6184: const PetscInt *fields, id = 1;
6185: PetscInt dsNf, f;
6187: PetscCall(DMGetRegionNumDS(dm, s, &label, &fieldIS, &ds, NULL));
6188: PetscCall(PetscDSGetNumFields(ds, &dsNf));
6189: PetscCall(ISGetIndices(fieldIS, &fields));
6190: PetscCall(PetscArrayzero(exacts, Nf));
6191: PetscCall(PetscArrayzero(ectxs, Nf));
6192: if (u) {
6193: for (f = 0; f < dsNf; ++f) PetscCall(PetscDSGetExactSolution(ds, fields[f], &exacts[fields[f]], &ectxs[fields[f]]));
6194: if (label) PetscCall(DMProjectFunctionLabelLocal(dm, time, label, 1, &id, 0, NULL, exacts, ectxs, INSERT_ALL_VALUES, locu));
6195: else PetscCall(DMProjectFunctionLocal(dm, time, exacts, ectxs, INSERT_ALL_VALUES, locu));
6196: }
6197: if (u_t) {
6198: PetscCall(PetscArrayzero(exacts, Nf));
6199: PetscCall(PetscArrayzero(ectxs, Nf));
6200: for (f = 0; f < dsNf; ++f) PetscCall(PetscDSGetExactSolutionTimeDerivative(ds, fields[f], &exacts[fields[f]], &ectxs[fields[f]]));
6201: if (label) PetscCall(DMProjectFunctionLabelLocal(dm, time, label, 1, &id, 0, NULL, exacts, ectxs, INSERT_ALL_VALUES, locu_t));
6202: else PetscCall(DMProjectFunctionLocal(dm, time, exacts, ectxs, INSERT_ALL_VALUES, locu_t));
6203: }
6204: PetscCall(ISRestoreIndices(fieldIS, &fields));
6205: }
6206: if (u) {
6207: PetscCall(PetscObjectSetName((PetscObject)u, "Exact Solution"));
6208: PetscCall(PetscObjectSetOptionsPrefix((PetscObject)u, "exact_"));
6209: }
6210: if (u_t) {
6211: PetscCall(PetscObjectSetName((PetscObject)u, "Exact Solution Time Derivative"));
6212: PetscCall(PetscObjectSetOptionsPrefix((PetscObject)u_t, "exact_t_"));
6213: }
6214: PetscCall(PetscFree2(exacts, ectxs));
6215: if (u) {
6216: PetscCall(DMLocalToGlobalBegin(dm, locu, INSERT_ALL_VALUES, u));
6217: PetscCall(DMLocalToGlobalEnd(dm, locu, INSERT_ALL_VALUES, u));
6218: PetscCall(DMRestoreLocalVector(dm, &locu));
6219: }
6220: if (u_t) {
6221: PetscCall(DMLocalToGlobalBegin(dm, locu_t, INSERT_ALL_VALUES, u_t));
6222: PetscCall(DMLocalToGlobalEnd(dm, locu_t, INSERT_ALL_VALUES, u_t));
6223: PetscCall(DMRestoreLocalVector(dm, &locu_t));
6224: }
6225: PetscFunctionReturn(PETSC_SUCCESS);
6226: }
6228: static PetscErrorCode DMTransferDS_Internal(DM dm, DMLabel label, IS fields, PetscInt minDegree, PetscInt maxDegree, PetscDS ds, PetscDS dsIn)
6229: {
6230: PetscDS dsNew, dsInNew = NULL;
6232: PetscFunctionBegin;
6233: PetscCall(PetscDSCreate(PetscObjectComm((PetscObject)ds), &dsNew));
6234: PetscCall(PetscDSCopy(ds, minDegree, maxDegree, dm, dsNew));
6235: if (dsIn) {
6236: PetscCall(PetscDSCreate(PetscObjectComm((PetscObject)dsIn), &dsInNew));
6237: PetscCall(PetscDSCopy(dsIn, minDegree, maxDegree, dm, dsInNew));
6238: }
6239: PetscCall(DMSetRegionDS(dm, label, fields, dsNew, dsInNew));
6240: PetscCall(PetscDSDestroy(&dsNew));
6241: PetscCall(PetscDSDestroy(&dsInNew));
6242: PetscFunctionReturn(PETSC_SUCCESS);
6243: }
6245: /*@
6246: DMCopyDS - Copy the discrete systems for the `DM` into another `DM`
6248: Collective
6250: Input Parameters:
6251: + dm - The `DM`
6252: . minDegree - Minimum degree for a discretization, or `PETSC_DETERMINE` for no limit
6253: - maxDegree - Maximum degree for a discretization, or `PETSC_DETERMINE` for no limit
6255: Output Parameter:
6256: . newdm - The `DM`
6258: Level: advanced
6260: .seealso: [](ch_dmbase), `DM`, `DMCopyFields()`, `DMAddField()`, `DMGetDS()`, `DMGetCellDS()`, `DMGetRegionDS()`, `DMSetRegionDS()`
6261: @*/
6262: PetscErrorCode DMCopyDS(DM dm, PetscInt minDegree, PetscInt maxDegree, DM newdm)
6263: {
6264: PetscInt Nds, s;
6266: PetscFunctionBegin;
6267: if (dm == newdm) PetscFunctionReturn(PETSC_SUCCESS);
6268: PetscCall(DMGetNumDS(dm, &Nds));
6269: PetscCall(DMClearDS(newdm));
6270: for (s = 0; s < Nds; ++s) {
6271: DMLabel label;
6272: IS fields;
6273: PetscDS ds, dsIn, newds;
6274: PetscInt Nbd, bd;
6276: PetscCall(DMGetRegionNumDS(dm, s, &label, &fields, &ds, &dsIn));
6277: /* TODO: We need to change all keys from labels in the old DM to labels in the new DM */
6278: PetscCall(DMTransferDS_Internal(newdm, label, fields, minDegree, maxDegree, ds, dsIn));
6279: /* Complete new labels in the new DS */
6280: PetscCall(DMGetRegionDS(newdm, label, NULL, &newds, NULL));
6281: PetscCall(PetscDSGetNumBoundary(newds, &Nbd));
6282: for (bd = 0; bd < Nbd; ++bd) {
6283: PetscWeakForm wf;
6284: DMLabel label;
6285: PetscInt field;
6287: PetscCall(PetscDSGetBoundary(newds, bd, &wf, NULL, NULL, &label, NULL, NULL, &field, NULL, NULL, NULL, NULL, NULL));
6288: PetscCall(PetscWeakFormReplaceLabel(wf, label));
6289: }
6290: }
6291: PetscCall(DMCompleteBCLabels_Internal(newdm));
6292: PetscFunctionReturn(PETSC_SUCCESS);
6293: }
6295: /*@
6296: DMCopyDisc - Copy the fields and discrete systems for the `DM` into another `DM`
6298: Collective
6300: Input Parameter:
6301: . dm - The `DM`
6303: Output Parameter:
6304: . newdm - The `DM`
6306: Level: advanced
6308: Developer Note:
6309: Really ugly name, nothing in PETSc is called a `Disc` plus it is an ugly abbreviation
6311: .seealso: [](ch_dmbase), `DM`, `DMCopyFields()`, `DMCopyDS()`
6312: @*/
6313: PetscErrorCode DMCopyDisc(DM dm, DM newdm)
6314: {
6315: PetscFunctionBegin;
6316: PetscCall(DMCopyFields(dm, PETSC_DETERMINE, PETSC_DETERMINE, newdm));
6317: PetscCall(DMCopyDS(dm, PETSC_DETERMINE, PETSC_DETERMINE, newdm));
6318: PetscFunctionReturn(PETSC_SUCCESS);
6319: }
6321: /*@
6322: DMGetDimension - Return the topological dimension of the `DM`
6324: Not Collective
6326: Input Parameter:
6327: . dm - The `DM`
6329: Output Parameter:
6330: . dim - The topological dimension
6332: Level: beginner
6334: .seealso: [](ch_dmbase), `DM`, `DMSetDimension()`, `DMCreate()`
6335: @*/
6336: PetscErrorCode DMGetDimension(DM dm, PetscInt *dim)
6337: {
6338: PetscFunctionBegin;
6340: PetscAssertPointer(dim, 2);
6341: *dim = dm->dim;
6342: PetscFunctionReturn(PETSC_SUCCESS);
6343: }
6345: /*@
6346: DMSetDimension - Set the topological dimension of the `DM`
6348: Collective
6350: Input Parameters:
6351: + dm - The `DM`
6352: - dim - The topological dimension
6354: Level: beginner
6356: .seealso: [](ch_dmbase), `DM`, `DMGetDimension()`, `DMCreate()`
6357: @*/
6358: PetscErrorCode DMSetDimension(DM dm, PetscInt dim)
6359: {
6360: PetscDS ds;
6361: PetscInt Nds, n;
6363: PetscFunctionBegin;
6366: dm->dim = dim;
6367: if (dm->dim >= 0) {
6368: PetscCall(DMGetNumDS(dm, &Nds));
6369: for (n = 0; n < Nds; ++n) {
6370: PetscCall(DMGetRegionNumDS(dm, n, NULL, NULL, &ds, NULL));
6371: if (ds->dimEmbed < 0) PetscCall(PetscDSSetCoordinateDimension(ds, dim));
6372: }
6373: }
6374: PetscFunctionReturn(PETSC_SUCCESS);
6375: }
6377: /*@
6378: DMGetDimPoints - Get the half-open interval for all points of a given dimension
6380: Collective
6382: Input Parameters:
6383: + dm - the `DM`
6384: - dim - the dimension
6386: Output Parameters:
6387: + pStart - The first point of the given dimension
6388: - pEnd - The first point following points of the given dimension
6390: Level: intermediate
6392: Note:
6393: The points are vertices in the Hasse diagram encoding the topology. This is explained in
6394: https://arxiv.org/abs/0908.4427. If no points exist of this dimension in the storage scheme,
6395: then the interval is empty.
6397: .seealso: [](ch_dmbase), `DM`, `DMPLEX`, `DMPlexGetDepthStratum()`, `DMPlexGetHeightStratum()`
6398: @*/
6399: PetscErrorCode DMGetDimPoints(DM dm, PetscInt dim, PetscInt *pStart, PetscInt *pEnd)
6400: {
6401: PetscInt d;
6403: PetscFunctionBegin;
6405: PetscCall(DMGetDimension(dm, &d));
6406: PetscCheck((dim >= 0) && (dim <= d), PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_OUTOFRANGE, "Invalid dimension %" PetscInt_FMT, dim);
6407: PetscUseTypeMethod(dm, getdimpoints, dim, pStart, pEnd);
6408: PetscFunctionReturn(PETSC_SUCCESS);
6409: }
6411: /*@
6412: DMGetOutputDM - Retrieve the `DM` associated with the layout for output
6414: Collective
6416: Input Parameter:
6417: . dm - The original `DM`
6419: Output Parameter:
6420: . odm - The `DM` which provides the layout for output
6422: Level: intermediate
6424: Note:
6425: In some situations the vector obtained with `DMCreateGlobalVector()` excludes points for degrees of freedom that are associated with fixed (Dirichelet) boundary
6426: conditions since the algebraic solver does not solve for those variables. The output `DM` includes these excluded points and its global vector contains the
6427: locations for those dof so that they can be output to a file or other viewer along with the unconstrained dof.
6429: .seealso: [](ch_dmbase), `DM`, `VecView()`, `DMGetGlobalSection()`, `DMCreateGlobalVector()`, `PetscSectionHasConstraints()`, `DMSetGlobalSection()`
6430: @*/
6431: PetscErrorCode DMGetOutputDM(DM dm, DM *odm)
6432: {
6433: PetscSection section;
6434: IS perm;
6435: PetscBool hasConstraints, newDM, gnewDM;
6436: PetscInt num_face_sfs = 0;
6438: PetscFunctionBegin;
6440: PetscAssertPointer(odm, 2);
6441: PetscCall(DMGetLocalSection(dm, §ion));
6442: PetscCall(PetscSectionHasConstraints(section, &hasConstraints));
6443: PetscCall(PetscSectionGetPermutation(section, &perm));
6444: PetscCall(DMPlexGetIsoperiodicFaceSF(dm, &num_face_sfs, NULL));
6445: newDM = hasConstraints || perm || (num_face_sfs > 0) ? PETSC_TRUE : PETSC_FALSE;
6446: PetscCallMPI(MPIU_Allreduce(&newDM, &gnewDM, 1, MPIU_BOOL, MPI_LOR, PetscObjectComm((PetscObject)dm)));
6447: if (!gnewDM) {
6448: *odm = dm;
6449: PetscFunctionReturn(PETSC_SUCCESS);
6450: }
6451: if (!dm->dmBC) {
6452: PetscSection newSection, gsection;
6453: PetscSF sf, sfNatural;
6454: PetscBool usePerm = dm->ignorePermOutput ? PETSC_FALSE : PETSC_TRUE;
6456: PetscCall(DMClone(dm, &dm->dmBC));
6457: PetscCall(DMCopyDisc(dm, dm->dmBC));
6458: PetscCall(PetscSectionClone(section, &newSection));
6459: PetscCall(DMSetLocalSection(dm->dmBC, newSection));
6460: PetscCall(PetscSectionDestroy(&newSection));
6461: PetscCall(DMGetNaturalSF(dm, &sfNatural));
6462: PetscCall(DMSetNaturalSF(dm->dmBC, sfNatural));
6463: PetscCall(DMGetPointSF(dm->dmBC, &sf));
6464: PetscCall(PetscSectionCreateGlobalSection(section, sf, usePerm, PETSC_TRUE, PETSC_FALSE, &gsection));
6465: PetscCall(DMSetGlobalSection(dm->dmBC, gsection));
6466: PetscCall(PetscSectionDestroy(&gsection));
6467: }
6468: *odm = dm->dmBC;
6469: PetscFunctionReturn(PETSC_SUCCESS);
6470: }
6472: /*@
6473: DMGetOutputSequenceNumber - Retrieve the sequence number/value for output
6475: Input Parameter:
6476: . dm - The original `DM`
6478: Output Parameters:
6479: + num - The output sequence number
6480: - val - The output sequence value
6482: Level: intermediate
6484: Note:
6485: This is intended for output that should appear in sequence, for instance
6486: a set of timesteps in an `PETSCVIEWERHDF5` file, or a set of realizations of a stochastic system.
6488: Developer Note:
6489: The `DM` serves as a convenient place to store the current iteration value. The iteration is not
6490: not directly related to the `DM`.
6492: .seealso: [](ch_dmbase), `DM`, `VecView()`
6493: @*/
6494: PetscErrorCode DMGetOutputSequenceNumber(DM dm, PetscInt *num, PetscReal *val)
6495: {
6496: PetscFunctionBegin;
6498: if (num) {
6499: PetscAssertPointer(num, 2);
6500: *num = dm->outputSequenceNum;
6501: }
6502: if (val) {
6503: PetscAssertPointer(val, 3);
6504: *val = dm->outputSequenceVal;
6505: }
6506: PetscFunctionReturn(PETSC_SUCCESS);
6507: }
6509: /*@
6510: DMSetOutputSequenceNumber - Set the sequence number/value for output
6512: Input Parameters:
6513: + dm - The original `DM`
6514: . num - The output sequence number
6515: - val - The output sequence value
6517: Level: intermediate
6519: Note:
6520: This is intended for output that should appear in sequence, for instance
6521: a set of timesteps in an `PETSCVIEWERHDF5` file, or a set of realizations of a stochastic system.
6523: .seealso: [](ch_dmbase), `DM`, `VecView()`
6524: @*/
6525: PetscErrorCode DMSetOutputSequenceNumber(DM dm, PetscInt num, PetscReal val)
6526: {
6527: PetscFunctionBegin;
6529: dm->outputSequenceNum = num;
6530: dm->outputSequenceVal = val;
6531: PetscFunctionReturn(PETSC_SUCCESS);
6532: }
6534: /*@
6535: DMOutputSequenceLoad - Retrieve the sequence value from a `PetscViewer`
6537: Input Parameters:
6538: + dm - The original `DM`
6539: . viewer - The `PetscViewer` to get it from
6540: . name - The sequence name
6541: - num - The output sequence number
6543: Output Parameter:
6544: . val - The output sequence value
6546: Level: intermediate
6548: Note:
6549: This is intended for output that should appear in sequence, for instance
6550: a set of timesteps in an `PETSCVIEWERHDF5` file, or a set of realizations of a stochastic system.
6552: Developer Note:
6553: It is unclear at the user API level why a `DM` is needed as input
6555: .seealso: [](ch_dmbase), `DM`, `DMGetOutputSequenceNumber()`, `DMSetOutputSequenceNumber()`, `VecView()`
6556: @*/
6557: PetscErrorCode DMOutputSequenceLoad(DM dm, PetscViewer viewer, const char name[], PetscInt num, PetscReal *val)
6558: {
6559: PetscBool ishdf5;
6561: PetscFunctionBegin;
6564: PetscAssertPointer(name, 3);
6565: PetscAssertPointer(val, 5);
6566: PetscCall(PetscObjectTypeCompare((PetscObject)viewer, PETSCVIEWERHDF5, &ishdf5));
6567: if (ishdf5) {
6568: #if defined(PETSC_HAVE_HDF5)
6569: PetscScalar value;
6571: PetscCall(DMSequenceLoad_HDF5_Internal(dm, name, num, &value, viewer));
6572: *val = PetscRealPart(value);
6573: #endif
6574: } else SETERRQ(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Invalid viewer; open viewer with PetscViewerHDF5Open()");
6575: PetscFunctionReturn(PETSC_SUCCESS);
6576: }
6578: /*@
6579: DMGetOutputSequenceLength - Retrieve the number of sequence values from a `PetscViewer`
6581: Input Parameters:
6582: + dm - The original `DM`
6583: . viewer - The `PetscViewer` to get it from
6584: - name - The sequence name
6586: Output Parameter:
6587: . len - The length of the output sequence
6589: Level: intermediate
6591: Note:
6592: This is intended for output that should appear in sequence, for instance
6593: a set of timesteps in an `PETSCVIEWERHDF5` file, or a set of realizations of a stochastic system.
6595: Developer Note:
6596: It is unclear at the user API level why a `DM` is needed as input
6598: .seealso: [](ch_dmbase), `DM`, `DMGetOutputSequenceNumber()`, `DMSetOutputSequenceNumber()`, `VecView()`
6599: @*/
6600: PetscErrorCode DMGetOutputSequenceLength(DM dm, PetscViewer viewer, const char name[], PetscInt *len)
6601: {
6602: PetscBool ishdf5;
6604: PetscFunctionBegin;
6607: PetscAssertPointer(name, 3);
6608: PetscAssertPointer(len, 4);
6609: PetscCall(PetscObjectTypeCompare((PetscObject)viewer, PETSCVIEWERHDF5, &ishdf5));
6610: if (ishdf5) {
6611: #if defined(PETSC_HAVE_HDF5)
6612: PetscCall(DMSequenceGetLength_HDF5_Internal(dm, name, len, viewer));
6613: #endif
6614: } else SETERRQ(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Invalid viewer; open viewer with PetscViewerHDF5Open()");
6615: PetscFunctionReturn(PETSC_SUCCESS);
6616: }
6618: /*@
6619: DMGetUseNatural - Get the flag for creating a mapping to the natural order when a `DM` is (re)distributed in parallel
6621: Not Collective
6623: Input Parameter:
6624: . dm - The `DM`
6626: Output Parameter:
6627: . useNatural - `PETSC_TRUE` to build the mapping to a natural order during distribution
6629: Level: beginner
6631: .seealso: [](ch_dmbase), `DM`, `DMSetUseNatural()`, `DMCreate()`
6632: @*/
6633: PetscErrorCode DMGetUseNatural(DM dm, PetscBool *useNatural)
6634: {
6635: PetscFunctionBegin;
6637: PetscAssertPointer(useNatural, 2);
6638: *useNatural = dm->useNatural;
6639: PetscFunctionReturn(PETSC_SUCCESS);
6640: }
6642: /*@
6643: DMSetUseNatural - Set the flag for creating a mapping to the natural order when a `DM` is (re)distributed in parallel
6645: Collective
6647: Input Parameters:
6648: + dm - The `DM`
6649: - useNatural - `PETSC_TRUE` to build the mapping to a natural order during distribution
6651: Level: beginner
6653: Note:
6654: This also causes the map to be build after `DMCreateSubDM()` and `DMCreateSuperDM()`
6656: .seealso: [](ch_dmbase), `DM`, `DMGetUseNatural()`, `DMCreate()`, `DMPlexDistribute()`, `DMCreateSubDM()`, `DMCreateSuperDM()`
6657: @*/
6658: PetscErrorCode DMSetUseNatural(DM dm, PetscBool useNatural)
6659: {
6660: PetscFunctionBegin;
6663: dm->useNatural = useNatural;
6664: PetscFunctionReturn(PETSC_SUCCESS);
6665: }
6667: /*@
6668: DMCreateLabel - Create a label of the given name if it does not already exist in the `DM`
6670: Not Collective
6672: Input Parameters:
6673: + dm - The `DM` object
6674: - name - The label name
6676: Level: intermediate
6678: .seealso: [](ch_dmbase), `DM`, `DMLabelCreate()`, `DMHasLabel()`, `DMGetLabelValue()`, `DMSetLabelValue()`, `DMGetStratumIS()`
6679: @*/
6680: PetscErrorCode DMCreateLabel(DM dm, const char name[])
6681: {
6682: PetscBool flg;
6683: DMLabel label;
6685: PetscFunctionBegin;
6687: PetscAssertPointer(name, 2);
6688: PetscCall(DMHasLabel(dm, name, &flg));
6689: if (!flg) {
6690: PetscCall(DMLabelCreate(PETSC_COMM_SELF, name, &label));
6691: PetscCall(DMAddLabel(dm, label));
6692: PetscCall(DMLabelDestroy(&label));
6693: }
6694: PetscFunctionReturn(PETSC_SUCCESS);
6695: }
6697: /*@
6698: DMCreateLabelAtIndex - Create a label of the given name at the given index. If it already exists in the `DM`, move it to this index.
6700: Not Collective
6702: Input Parameters:
6703: + dm - The `DM` object
6704: . l - The index for the label
6705: - name - The label name
6707: Level: intermediate
6709: .seealso: [](ch_dmbase), `DM`, `DMCreateLabel()`, `DMLabelCreate()`, `DMHasLabel()`, `DMGetLabelValue()`, `DMSetLabelValue()`, `DMGetStratumIS()`
6710: @*/
6711: PetscErrorCode DMCreateLabelAtIndex(DM dm, PetscInt l, const char name[])
6712: {
6713: DMLabelLink orig, prev = NULL;
6714: DMLabel label;
6715: PetscInt Nl, m;
6716: PetscBool flg, match;
6717: const char *lname;
6719: PetscFunctionBegin;
6721: PetscAssertPointer(name, 3);
6722: PetscCall(DMHasLabel(dm, name, &flg));
6723: if (!flg) {
6724: PetscCall(DMLabelCreate(PETSC_COMM_SELF, name, &label));
6725: PetscCall(DMAddLabel(dm, label));
6726: PetscCall(DMLabelDestroy(&label));
6727: }
6728: PetscCall(DMGetNumLabels(dm, &Nl));
6729: PetscCheck(l < Nl, PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "Label index %" PetscInt_FMT " must be in [0, %" PetscInt_FMT ")", l, Nl);
6730: for (m = 0, orig = dm->labels; m < Nl; ++m, prev = orig, orig = orig->next) {
6731: PetscCall(PetscObjectGetName((PetscObject)orig->label, &lname));
6732: PetscCall(PetscStrcmp(name, lname, &match));
6733: if (match) break;
6734: }
6735: if (m == l) PetscFunctionReturn(PETSC_SUCCESS);
6736: if (!m) dm->labels = orig->next;
6737: else prev->next = orig->next;
6738: if (!l) {
6739: orig->next = dm->labels;
6740: dm->labels = orig;
6741: } else {
6742: for (m = 0, prev = dm->labels; m < l - 1; ++m, prev = prev->next);
6743: orig->next = prev->next;
6744: prev->next = orig;
6745: }
6746: PetscFunctionReturn(PETSC_SUCCESS);
6747: }
6749: /*@
6750: DMGetLabelValue - Get the value in a `DMLabel` for the given point, with -1 as the default
6752: Not Collective
6754: Input Parameters:
6755: + dm - The `DM` object
6756: . name - The label name
6757: - point - The mesh point
6759: Output Parameter:
6760: . value - The label value for this point, or -1 if the point is not in the label
6762: Level: beginner
6764: .seealso: [](ch_dmbase), `DM`, `DMLabelGetValue()`, `DMSetLabelValue()`, `DMGetStratumIS()`
6765: @*/
6766: PetscErrorCode DMGetLabelValue(DM dm, const char name[], PetscInt point, PetscInt *value)
6767: {
6768: DMLabel label;
6770: PetscFunctionBegin;
6772: PetscAssertPointer(name, 2);
6773: PetscCall(DMGetLabel(dm, name, &label));
6774: PetscCheck(label, PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "No label named %s was found", name);
6775: PetscCall(DMLabelGetValue(label, point, value));
6776: PetscFunctionReturn(PETSC_SUCCESS);
6777: }
6779: /*@
6780: DMSetLabelValue - Add a point to a `DMLabel` with given value
6782: Not Collective
6784: Input Parameters:
6785: + dm - The `DM` object
6786: . name - The label name
6787: . point - The mesh point
6788: - value - The label value for this point
6790: Output Parameter:
6792: Level: beginner
6794: .seealso: [](ch_dmbase), `DM`, `DMLabelSetValue()`, `DMGetStratumIS()`, `DMClearLabelValue()`
6795: @*/
6796: PetscErrorCode DMSetLabelValue(DM dm, const char name[], PetscInt point, PetscInt value)
6797: {
6798: DMLabel label;
6800: PetscFunctionBegin;
6802: PetscAssertPointer(name, 2);
6803: PetscCall(DMGetLabel(dm, name, &label));
6804: if (!label) {
6805: PetscCall(DMCreateLabel(dm, name));
6806: PetscCall(DMGetLabel(dm, name, &label));
6807: }
6808: PetscCall(DMLabelSetValue(label, point, value));
6809: PetscFunctionReturn(PETSC_SUCCESS);
6810: }
6812: /*@
6813: DMClearLabelValue - Remove a point from a `DMLabel` with given value
6815: Not Collective
6817: Input Parameters:
6818: + dm - The `DM` object
6819: . name - The label name
6820: . point - The mesh point
6821: - value - The label value for this point
6823: Level: beginner
6825: .seealso: [](ch_dmbase), `DM`, `DMLabelClearValue()`, `DMSetLabelValue()`, `DMGetStratumIS()`
6826: @*/
6827: PetscErrorCode DMClearLabelValue(DM dm, const char name[], PetscInt point, PetscInt value)
6828: {
6829: DMLabel label;
6831: PetscFunctionBegin;
6833: PetscAssertPointer(name, 2);
6834: PetscCall(DMGetLabel(dm, name, &label));
6835: if (!label) PetscFunctionReturn(PETSC_SUCCESS);
6836: PetscCall(DMLabelClearValue(label, point, value));
6837: PetscFunctionReturn(PETSC_SUCCESS);
6838: }
6840: /*@
6841: DMGetLabelSize - Get the value of `DMLabelGetNumValues()` of a `DMLabel` in the `DM`
6843: Not Collective
6845: Input Parameters:
6846: + dm - The `DM` object
6847: - name - The label name
6849: Output Parameter:
6850: . size - The number of different integer ids, or 0 if the label does not exist
6852: Level: beginner
6854: Developer Note:
6855: This should be renamed to something like `DMGetLabelNumValues()` or removed.
6857: .seealso: [](ch_dmbase), `DM`, `DMLabelGetNumValues()`, `DMSetLabelValue()`, `DMGetLabel()`
6858: @*/
6859: PetscErrorCode DMGetLabelSize(DM dm, const char name[], PetscInt *size)
6860: {
6861: DMLabel label;
6863: PetscFunctionBegin;
6865: PetscAssertPointer(name, 2);
6866: PetscAssertPointer(size, 3);
6867: PetscCall(DMGetLabel(dm, name, &label));
6868: *size = 0;
6869: if (!label) PetscFunctionReturn(PETSC_SUCCESS);
6870: PetscCall(DMLabelGetNumValues(label, size));
6871: PetscFunctionReturn(PETSC_SUCCESS);
6872: }
6874: /*@
6875: DMGetLabelIdIS - Get the `DMLabelGetValueIS()` from a `DMLabel` in the `DM`
6877: Not Collective
6879: Input Parameters:
6880: + dm - The `DM` object
6881: - name - The label name
6883: Output Parameter:
6884: . ids - The integer ids, or `NULL` if the label does not exist
6886: Level: beginner
6888: .seealso: [](ch_dmbase), `DM`, `DMLabelGetValueIS()`, `DMGetLabelSize()`
6889: @*/
6890: PetscErrorCode DMGetLabelIdIS(DM dm, const char name[], IS *ids)
6891: {
6892: DMLabel label;
6894: PetscFunctionBegin;
6896: PetscAssertPointer(name, 2);
6897: PetscAssertPointer(ids, 3);
6898: PetscCall(DMGetLabel(dm, name, &label));
6899: *ids = NULL;
6900: if (label) {
6901: PetscCall(DMLabelGetValueIS(label, ids));
6902: } else {
6903: /* returning an empty IS */
6904: PetscCall(ISCreateGeneral(PETSC_COMM_SELF, 0, NULL, PETSC_USE_POINTER, ids));
6905: }
6906: PetscFunctionReturn(PETSC_SUCCESS);
6907: }
6909: /*@
6910: DMGetStratumSize - Get the number of points in a label stratum
6912: Not Collective
6914: Input Parameters:
6915: + dm - The `DM` object
6916: . name - The label name of the stratum
6917: - value - The stratum value
6919: Output Parameter:
6920: . size - The number of points, also called the stratum size
6922: Level: beginner
6924: .seealso: [](ch_dmbase), `DM`, `DMLabelGetStratumSize()`, `DMGetLabelSize()`, `DMGetLabelIds()`
6925: @*/
6926: PetscErrorCode DMGetStratumSize(DM dm, const char name[], PetscInt value, PetscInt *size)
6927: {
6928: DMLabel label;
6930: PetscFunctionBegin;
6932: PetscAssertPointer(name, 2);
6933: PetscAssertPointer(size, 4);
6934: PetscCall(DMGetLabel(dm, name, &label));
6935: *size = 0;
6936: if (!label) PetscFunctionReturn(PETSC_SUCCESS);
6937: PetscCall(DMLabelGetStratumSize(label, value, size));
6938: PetscFunctionReturn(PETSC_SUCCESS);
6939: }
6941: /*@
6942: DMGetStratumIS - Get the points in a label stratum
6944: Not Collective
6946: Input Parameters:
6947: + dm - The `DM` object
6948: . name - The label name
6949: - value - The stratum value
6951: Output Parameter:
6952: . points - The stratum points, or `NULL` if the label does not exist or does not have that value
6954: Level: beginner
6956: .seealso: [](ch_dmbase), `DM`, `DMLabelGetStratumIS()`, `DMGetStratumSize()`
6957: @*/
6958: PetscErrorCode DMGetStratumIS(DM dm, const char name[], PetscInt value, IS *points)
6959: {
6960: DMLabel label;
6962: PetscFunctionBegin;
6964: PetscAssertPointer(name, 2);
6965: PetscAssertPointer(points, 4);
6966: PetscCall(DMGetLabel(dm, name, &label));
6967: *points = NULL;
6968: if (!label) PetscFunctionReturn(PETSC_SUCCESS);
6969: PetscCall(DMLabelGetStratumIS(label, value, points));
6970: PetscFunctionReturn(PETSC_SUCCESS);
6971: }
6973: /*@
6974: DMSetStratumIS - Set the points in a label stratum
6976: Not Collective
6978: Input Parameters:
6979: + dm - The `DM` object
6980: . name - The label name
6981: . value - The stratum value
6982: - points - The stratum points
6984: Level: beginner
6986: .seealso: [](ch_dmbase), `DM`, `DMLabel`, `DMClearLabelStratum()`, `DMLabelClearStratum()`, `DMLabelSetStratumIS()`, `DMGetStratumSize()`
6987: @*/
6988: PetscErrorCode DMSetStratumIS(DM dm, const char name[], PetscInt value, IS points)
6989: {
6990: DMLabel label;
6992: PetscFunctionBegin;
6994: PetscAssertPointer(name, 2);
6996: PetscCall(DMGetLabel(dm, name, &label));
6997: if (!label) PetscFunctionReturn(PETSC_SUCCESS);
6998: PetscCall(DMLabelSetStratumIS(label, value, points));
6999: PetscFunctionReturn(PETSC_SUCCESS);
7000: }
7002: /*@
7003: DMClearLabelStratum - Remove all points from a stratum from a `DMLabel`
7005: Not Collective
7007: Input Parameters:
7008: + dm - The `DM` object
7009: . name - The label name
7010: - value - The label value for this point
7012: Output Parameter:
7014: Level: beginner
7016: .seealso: [](ch_dmbase), `DM`, `DMLabel`, `DMLabelClearStratum()`, `DMSetLabelValue()`, `DMGetStratumIS()`, `DMClearLabelValue()`
7017: @*/
7018: PetscErrorCode DMClearLabelStratum(DM dm, const char name[], PetscInt value)
7019: {
7020: DMLabel label;
7022: PetscFunctionBegin;
7024: PetscAssertPointer(name, 2);
7025: PetscCall(DMGetLabel(dm, name, &label));
7026: if (!label) PetscFunctionReturn(PETSC_SUCCESS);
7027: PetscCall(DMLabelClearStratum(label, value));
7028: PetscFunctionReturn(PETSC_SUCCESS);
7029: }
7031: /*@
7032: DMGetNumLabels - Return the number of labels defined by on the `DM`
7034: Not Collective
7036: Input Parameter:
7037: . dm - The `DM` object
7039: Output Parameter:
7040: . numLabels - the number of Labels
7042: Level: intermediate
7044: .seealso: [](ch_dmbase), `DM`, `DMLabel`, `DMGetLabelByNum()`, `DMGetLabelName()`, `DMGetLabelValue()`, `DMSetLabelValue()`, `DMGetStratumIS()`
7045: @*/
7046: PetscErrorCode DMGetNumLabels(DM dm, PetscInt *numLabels)
7047: {
7048: DMLabelLink next = dm->labels;
7049: PetscInt n = 0;
7051: PetscFunctionBegin;
7053: PetscAssertPointer(numLabels, 2);
7054: while (next) {
7055: ++n;
7056: next = next->next;
7057: }
7058: *numLabels = n;
7059: PetscFunctionReturn(PETSC_SUCCESS);
7060: }
7062: /*@
7063: DMGetLabelName - Return the name of nth label
7065: Not Collective
7067: Input Parameters:
7068: + dm - The `DM` object
7069: - n - the label number
7071: Output Parameter:
7072: . name - the label name
7074: Level: intermediate
7076: Developer Note:
7077: Some of the functions that appropriate on labels using their number have the suffix ByNum, others do not.
7079: .seealso: [](ch_dmbase), `DM`, `DMLabel`, `DMGetLabelByNum()`, `DMGetLabel()`, `DMGetLabelValue()`, `DMSetLabelValue()`, `DMGetStratumIS()`
7080: @*/
7081: PetscErrorCode DMGetLabelName(DM dm, PetscInt n, const char *name[])
7082: {
7083: DMLabelLink next = dm->labels;
7084: PetscInt l = 0;
7086: PetscFunctionBegin;
7088: PetscAssertPointer(name, 3);
7089: while (next) {
7090: if (l == n) {
7091: PetscCall(PetscObjectGetName((PetscObject)next->label, name));
7092: PetscFunctionReturn(PETSC_SUCCESS);
7093: }
7094: ++l;
7095: next = next->next;
7096: }
7097: SETERRQ(PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "Label %" PetscInt_FMT " does not exist in this DM", n);
7098: }
7100: /*@
7101: DMHasLabel - Determine whether the `DM` has a label of a given name
7103: Not Collective
7105: Input Parameters:
7106: + dm - The `DM` object
7107: - name - The label name
7109: Output Parameter:
7110: . hasLabel - `PETSC_TRUE` if the label is present
7112: Level: intermediate
7114: .seealso: [](ch_dmbase), `DM`, `DMLabel`, `DMGetLabel()`, `DMGetLabelByNum()`, `DMCreateLabel()`, `DMGetLabelValue()`, `DMSetLabelValue()`, `DMGetStratumIS()`
7115: @*/
7116: PetscErrorCode DMHasLabel(DM dm, const char name[], PetscBool *hasLabel)
7117: {
7118: DMLabelLink next = dm->labels;
7119: const char *lname;
7121: PetscFunctionBegin;
7123: PetscAssertPointer(name, 2);
7124: PetscAssertPointer(hasLabel, 3);
7125: *hasLabel = PETSC_FALSE;
7126: while (next) {
7127: PetscCall(PetscObjectGetName((PetscObject)next->label, &lname));
7128: PetscCall(PetscStrcmp(name, lname, hasLabel));
7129: if (*hasLabel) break;
7130: next = next->next;
7131: }
7132: PetscFunctionReturn(PETSC_SUCCESS);
7133: }
7135: // PetscClangLinter pragma ignore: -fdoc-section-header-unknown
7136: /*@
7137: DMGetLabel - Return the label of a given name, or `NULL`, from a `DM`
7139: Not Collective
7141: Input Parameters:
7142: + dm - The `DM` object
7143: - name - The label name
7145: Output Parameter:
7146: . label - The `DMLabel`, or `NULL` if the label is absent
7148: Default labels in a `DMPLEX`:
7149: + "depth" - Holds the depth (co-dimension) of each mesh point
7150: . "celltype" - Holds the topological type of each cell
7151: . "ghost" - If the DM is distributed with overlap, this marks the cells and faces in the overlap
7152: . "Cell Sets" - Mirrors the cell sets defined by GMsh and ExodusII
7153: . "Face Sets" - Mirrors the face sets defined by GMsh and ExodusII
7154: - "Vertex Sets" - Mirrors the vertex sets defined by GMsh
7156: Level: intermediate
7158: .seealso: [](ch_dmbase), `DM`, `DMLabel`, `DMHasLabel()`, `DMGetLabelByNum()`, `DMAddLabel()`, `DMCreateLabel()`, `DMPlexGetDepthLabel()`, `DMPlexGetCellType()`
7159: @*/
7160: PetscErrorCode DMGetLabel(DM dm, const char name[], DMLabel *label)
7161: {
7162: DMLabelLink next = dm->labels;
7163: PetscBool hasLabel;
7164: const char *lname;
7166: PetscFunctionBegin;
7168: PetscAssertPointer(name, 2);
7169: PetscAssertPointer(label, 3);
7170: *label = NULL;
7171: while (next) {
7172: PetscCall(PetscObjectGetName((PetscObject)next->label, &lname));
7173: PetscCall(PetscStrcmp(name, lname, &hasLabel));
7174: if (hasLabel) {
7175: *label = next->label;
7176: break;
7177: }
7178: next = next->next;
7179: }
7180: PetscFunctionReturn(PETSC_SUCCESS);
7181: }
7183: /*@
7184: DMGetLabelByNum - Return the nth label on a `DM`
7186: Not Collective
7188: Input Parameters:
7189: + dm - The `DM` object
7190: - n - the label number
7192: Output Parameter:
7193: . label - the label
7195: Level: intermediate
7197: .seealso: [](ch_dmbase), `DM`, `DMLabel`, `DMAddLabel()`, `DMGetLabelValue()`, `DMSetLabelValue()`, `DMGetStratumIS()`
7198: @*/
7199: PetscErrorCode DMGetLabelByNum(DM dm, PetscInt n, DMLabel *label)
7200: {
7201: DMLabelLink next = dm->labels;
7202: PetscInt l = 0;
7204: PetscFunctionBegin;
7206: PetscAssertPointer(label, 3);
7207: while (next) {
7208: if (l == n) {
7209: *label = next->label;
7210: PetscFunctionReturn(PETSC_SUCCESS);
7211: }
7212: ++l;
7213: next = next->next;
7214: }
7215: SETERRQ(PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "Label %" PetscInt_FMT " does not exist in this DM", n);
7216: }
7218: /*@
7219: DMAddLabel - Add the label to this `DM`
7221: Not Collective
7223: Input Parameters:
7224: + dm - The `DM` object
7225: - label - The `DMLabel`
7227: Level: developer
7229: .seealso: [](ch_dmbase), `DM`, `DMLabel`, `DMCreateLabel()`, `DMHasLabel()`, `DMGetLabelValue()`, `DMSetLabelValue()`, `DMGetStratumIS()`
7230: @*/
7231: PetscErrorCode DMAddLabel(DM dm, DMLabel label)
7232: {
7233: DMLabelLink l, *p, tmpLabel;
7234: PetscBool hasLabel;
7235: const char *lname;
7236: PetscBool flg;
7238: PetscFunctionBegin;
7240: PetscCall(PetscObjectGetName((PetscObject)label, &lname));
7241: PetscCall(DMHasLabel(dm, lname, &hasLabel));
7242: PetscCheck(!hasLabel, PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "Label %s already exists in this DM", lname);
7243: PetscCall(PetscCalloc1(1, &tmpLabel));
7244: tmpLabel->label = label;
7245: tmpLabel->output = PETSC_TRUE;
7246: for (p = &dm->labels; (l = *p); p = &l->next) { }
7247: *p = tmpLabel;
7248: PetscCall(PetscObjectReference((PetscObject)label));
7249: PetscCall(PetscStrcmp(lname, "depth", &flg));
7250: if (flg) dm->depthLabel = label;
7251: PetscCall(PetscStrcmp(lname, "celltype", &flg));
7252: if (flg) dm->celltypeLabel = label;
7253: PetscFunctionReturn(PETSC_SUCCESS);
7254: }
7256: // PetscClangLinter pragma ignore: -fdoc-section-header-unknown
7257: /*@
7258: DMSetLabel - Replaces the label of a given name, or ignores it if the name is not present
7260: Not Collective
7262: Input Parameters:
7263: + dm - The `DM` object
7264: - label - The `DMLabel`, having the same name, to substitute
7266: Default labels in a `DMPLEX`:
7267: + "depth" - Holds the depth (co-dimension) of each mesh point
7268: . "celltype" - Holds the topological type of each cell
7269: . "ghost" - If the DM is distributed with overlap, this marks the cells and faces in the overlap
7270: . "Cell Sets" - Mirrors the cell sets defined by GMsh and ExodusII
7271: . "Face Sets" - Mirrors the face sets defined by GMsh and ExodusII
7272: - "Vertex Sets" - Mirrors the vertex sets defined by GMsh
7274: Level: intermediate
7276: .seealso: [](ch_dmbase), `DM`, `DMLabel`, `DMCreateLabel()`, `DMHasLabel()`, `DMPlexGetDepthLabel()`, `DMPlexGetCellType()`
7277: @*/
7278: PetscErrorCode DMSetLabel(DM dm, DMLabel label)
7279: {
7280: DMLabelLink next = dm->labels;
7281: PetscBool hasLabel, flg;
7282: const char *name, *lname;
7284: PetscFunctionBegin;
7287: PetscCall(PetscObjectGetName((PetscObject)label, &name));
7288: while (next) {
7289: PetscCall(PetscObjectGetName((PetscObject)next->label, &lname));
7290: PetscCall(PetscStrcmp(name, lname, &hasLabel));
7291: if (hasLabel) {
7292: PetscCall(PetscObjectReference((PetscObject)label));
7293: PetscCall(PetscStrcmp(lname, "depth", &flg));
7294: if (flg) dm->depthLabel = label;
7295: PetscCall(PetscStrcmp(lname, "celltype", &flg));
7296: if (flg) dm->celltypeLabel = label;
7297: PetscCall(DMLabelDestroy(&next->label));
7298: next->label = label;
7299: break;
7300: }
7301: next = next->next;
7302: }
7303: PetscFunctionReturn(PETSC_SUCCESS);
7304: }
7306: /*@
7307: DMRemoveLabel - Remove the label given by name from this `DM`
7309: Not Collective
7311: Input Parameters:
7312: + dm - The `DM` object
7313: - name - The label name
7315: Output Parameter:
7316: . label - The `DMLabel`, or `NULL` if the label is absent. Pass in `NULL` to call `DMLabelDestroy()` on the label, otherwise the
7317: caller is responsible for calling `DMLabelDestroy()`.
7319: Level: developer
7321: .seealso: [](ch_dmbase), `DM`, `DMLabel`, `DMCreateLabel()`, `DMHasLabel()`, `DMGetLabel()`, `DMGetLabelValue()`, `DMSetLabelValue()`, `DMLabelDestroy()`, `DMRemoveLabelBySelf()`
7322: @*/
7323: PetscErrorCode DMRemoveLabel(DM dm, const char name[], DMLabel *label)
7324: {
7325: DMLabelLink link, *pnext;
7326: PetscBool hasLabel;
7327: const char *lname;
7329: PetscFunctionBegin;
7331: PetscAssertPointer(name, 2);
7332: if (label) {
7333: PetscAssertPointer(label, 3);
7334: *label = NULL;
7335: }
7336: for (pnext = &dm->labels; (link = *pnext); pnext = &link->next) {
7337: PetscCall(PetscObjectGetName((PetscObject)link->label, &lname));
7338: PetscCall(PetscStrcmp(name, lname, &hasLabel));
7339: if (hasLabel) {
7340: *pnext = link->next; /* Remove from list */
7341: PetscCall(PetscStrcmp(name, "depth", &hasLabel));
7342: if (hasLabel) dm->depthLabel = NULL;
7343: PetscCall(PetscStrcmp(name, "celltype", &hasLabel));
7344: if (hasLabel) dm->celltypeLabel = NULL;
7345: if (label) *label = link->label;
7346: else PetscCall(DMLabelDestroy(&link->label));
7347: PetscCall(PetscFree(link));
7348: break;
7349: }
7350: }
7351: PetscFunctionReturn(PETSC_SUCCESS);
7352: }
7354: /*@
7355: DMRemoveLabelBySelf - Remove the label from this `DM`
7357: Not Collective
7359: Input Parameters:
7360: + dm - The `DM` object
7361: . label - The `DMLabel` to be removed from the `DM`
7362: - failNotFound - Should it fail if the label is not found in the `DM`?
7364: Level: developer
7366: Note:
7367: Only exactly the same instance is removed if found, name match is ignored.
7368: If the `DM` has an exclusive reference to the label, the label gets destroyed and
7369: *label nullified.
7371: .seealso: [](ch_dmbase), `DM`, `DMLabel`, `DMCreateLabel()`, `DMHasLabel()`, `DMGetLabel()` `DMGetLabelValue()`, `DMSetLabelValue()`, `DMLabelDestroy()`, `DMRemoveLabel()`
7372: @*/
7373: PetscErrorCode DMRemoveLabelBySelf(DM dm, DMLabel *label, PetscBool failNotFound)
7374: {
7375: DMLabelLink link, *pnext;
7376: PetscBool hasLabel = PETSC_FALSE;
7378: PetscFunctionBegin;
7380: PetscAssertPointer(label, 2);
7381: if (!*label && !failNotFound) PetscFunctionReturn(PETSC_SUCCESS);
7384: for (pnext = &dm->labels; (link = *pnext); pnext = &link->next) {
7385: if (*label == link->label) {
7386: hasLabel = PETSC_TRUE;
7387: *pnext = link->next; /* Remove from list */
7388: if (*label == dm->depthLabel) dm->depthLabel = NULL;
7389: if (*label == dm->celltypeLabel) dm->celltypeLabel = NULL;
7390: if (((PetscObject)link->label)->refct < 2) *label = NULL; /* nullify if exclusive reference */
7391: PetscCall(DMLabelDestroy(&link->label));
7392: PetscCall(PetscFree(link));
7393: break;
7394: }
7395: }
7396: PetscCheck(hasLabel || !failNotFound, PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_WRONG, "Given label not found in DM");
7397: PetscFunctionReturn(PETSC_SUCCESS);
7398: }
7400: /*@
7401: DMGetLabelOutput - Get the output flag for a given label
7403: Not Collective
7405: Input Parameters:
7406: + dm - The `DM` object
7407: - name - The label name
7409: Output Parameter:
7410: . output - The flag for output
7412: Level: developer
7414: .seealso: [](ch_dmbase), `DM`, `DMLabel`, `DMSetLabelOutput()`, `DMCreateLabel()`, `DMHasLabel()`, `DMGetLabelValue()`, `DMSetLabelValue()`, `DMGetStratumIS()`
7415: @*/
7416: PetscErrorCode DMGetLabelOutput(DM dm, const char name[], PetscBool *output)
7417: {
7418: DMLabelLink next = dm->labels;
7419: const char *lname;
7421: PetscFunctionBegin;
7423: PetscAssertPointer(name, 2);
7424: PetscAssertPointer(output, 3);
7425: while (next) {
7426: PetscBool flg;
7428: PetscCall(PetscObjectGetName((PetscObject)next->label, &lname));
7429: PetscCall(PetscStrcmp(name, lname, &flg));
7430: if (flg) {
7431: *output = next->output;
7432: PetscFunctionReturn(PETSC_SUCCESS);
7433: }
7434: next = next->next;
7435: }
7436: SETERRQ(PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "No label named %s was present in this dm", name);
7437: }
7439: /*@
7440: DMSetLabelOutput - Set if a given label should be saved to a `PetscViewer` in calls to `DMView()`
7442: Not Collective
7444: Input Parameters:
7445: + dm - The `DM` object
7446: . name - The label name
7447: - output - `PETSC_TRUE` to save the label to the viewer
7449: Level: developer
7451: .seealso: [](ch_dmbase), `DM`, `DMLabel`, `DMGetOutputFlag()`, `DMGetLabelOutput()`, `DMCreateLabel()`, `DMHasLabel()`, `DMGetLabelValue()`, `DMSetLabelValue()`, `DMGetStratumIS()`
7452: @*/
7453: PetscErrorCode DMSetLabelOutput(DM dm, const char name[], PetscBool output)
7454: {
7455: DMLabelLink next = dm->labels;
7456: const char *lname;
7458: PetscFunctionBegin;
7460: PetscAssertPointer(name, 2);
7461: while (next) {
7462: PetscBool flg;
7464: PetscCall(PetscObjectGetName((PetscObject)next->label, &lname));
7465: PetscCall(PetscStrcmp(name, lname, &flg));
7466: if (flg) {
7467: next->output = output;
7468: PetscFunctionReturn(PETSC_SUCCESS);
7469: }
7470: next = next->next;
7471: }
7472: SETERRQ(PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "No label named %s was present in this dm", name);
7473: }
7475: /*@
7476: DMCopyLabels - Copy labels from one `DM` mesh to another `DM` with a superset of the points
7478: Collective
7480: Input Parameters:
7481: + dmA - The `DM` object with initial labels
7482: . dmB - The `DM` object to which labels are copied
7483: . mode - Copy labels by pointers (`PETSC_OWN_POINTER`) or duplicate them (`PETSC_COPY_VALUES`)
7484: . all - Copy all labels including "depth", "dim", and "celltype" (`PETSC_TRUE`) which are otherwise ignored (`PETSC_FALSE`)
7485: - emode - How to behave when a `DMLabel` in the source and destination `DM`s with the same name is encountered (see `DMCopyLabelsMode`)
7487: Level: intermediate
7489: Note:
7490: This is typically used when interpolating or otherwise adding to a mesh, or testing.
7492: .seealso: [](ch_dmbase), `DM`, `DMLabel`, `DMAddLabel()`, `DMCopyLabelsMode`
7493: @*/
7494: PetscErrorCode DMCopyLabels(DM dmA, DM dmB, PetscCopyMode mode, PetscBool all, DMCopyLabelsMode emode)
7495: {
7496: DMLabel label, labelNew, labelOld;
7497: const char *name;
7498: PetscBool flg;
7499: DMLabelLink link;
7501: PetscFunctionBegin;
7506: PetscCheck(mode != PETSC_USE_POINTER, PetscObjectComm((PetscObject)dmA), PETSC_ERR_SUP, "PETSC_USE_POINTER not supported for objects");
7507: if (dmA == dmB) PetscFunctionReturn(PETSC_SUCCESS);
7508: for (link = dmA->labels; link; link = link->next) {
7509: label = link->label;
7510: PetscCall(PetscObjectGetName((PetscObject)label, &name));
7511: if (!all) {
7512: PetscCall(PetscStrcmp(name, "depth", &flg));
7513: if (flg) continue;
7514: PetscCall(PetscStrcmp(name, "dim", &flg));
7515: if (flg) continue;
7516: PetscCall(PetscStrcmp(name, "celltype", &flg));
7517: if (flg) continue;
7518: }
7519: PetscCall(DMGetLabel(dmB, name, &labelOld));
7520: if (labelOld) {
7521: switch (emode) {
7522: case DM_COPY_LABELS_KEEP:
7523: continue;
7524: case DM_COPY_LABELS_REPLACE:
7525: PetscCall(DMRemoveLabelBySelf(dmB, &labelOld, PETSC_TRUE));
7526: break;
7527: case DM_COPY_LABELS_FAIL:
7528: SETERRQ(PetscObjectComm((PetscObject)dmA), PETSC_ERR_ARG_OUTOFRANGE, "Label %s already exists in destination DM", name);
7529: default:
7530: SETERRQ(PetscObjectComm((PetscObject)dmA), PETSC_ERR_ARG_OUTOFRANGE, "Unhandled DMCopyLabelsMode %d", (int)emode);
7531: }
7532: }
7533: if (mode == PETSC_COPY_VALUES) {
7534: PetscCall(DMLabelDuplicate(label, &labelNew));
7535: } else {
7536: labelNew = label;
7537: }
7538: PetscCall(DMAddLabel(dmB, labelNew));
7539: if (mode == PETSC_COPY_VALUES) PetscCall(DMLabelDestroy(&labelNew));
7540: }
7541: PetscFunctionReturn(PETSC_SUCCESS);
7542: }
7544: /*@C
7545: DMCompareLabels - Compare labels between two `DM` objects
7547: Collective; No Fortran Support
7549: Input Parameters:
7550: + dm0 - First `DM` object
7551: - dm1 - Second `DM` object
7553: Output Parameters:
7554: + equal - (Optional) Flag whether labels of dm0 and dm1 are the same
7555: - message - (Optional) Message describing the difference, or `NULL` if there is no difference
7557: Level: intermediate
7559: Notes:
7560: The output flag equal will be the same on all processes.
7562: If equal is passed as `NULL` and difference is found, an error is thrown on all processes.
7564: Make sure to pass equal is `NULL` on all processes or none of them.
7566: The output message is set independently on each rank.
7568: message must be freed with `PetscFree()`
7570: If message is passed as `NULL` and a difference is found, the difference description is printed to stderr in synchronized manner.
7572: Make sure to pass message as `NULL` on all processes or no processes.
7574: Labels are matched by name. If the number of labels and their names are equal,
7575: `DMLabelCompare()` is used to compare each pair of labels with the same name.
7577: Developer Note:
7578: Can automatically generate the Fortran stub because `message` must be freed with `PetscFree()`
7580: .seealso: [](ch_dmbase), `DM`, `DMLabel`, `DMAddLabel()`, `DMCopyLabelsMode`, `DMLabelCompare()`
7581: @*/
7582: PetscErrorCode DMCompareLabels(DM dm0, DM dm1, PetscBool *equal, char **message)
7583: {
7584: PetscInt n, i;
7585: char msg[PETSC_MAX_PATH_LEN] = "";
7586: PetscBool eq;
7587: MPI_Comm comm;
7588: PetscMPIInt rank;
7590: PetscFunctionBegin;
7593: PetscCheckSameComm(dm0, 1, dm1, 2);
7594: if (equal) PetscAssertPointer(equal, 3);
7595: if (message) PetscAssertPointer(message, 4);
7596: PetscCall(PetscObjectGetComm((PetscObject)dm0, &comm));
7597: PetscCallMPI(MPI_Comm_rank(comm, &rank));
7598: {
7599: PetscInt n1;
7601: PetscCall(DMGetNumLabels(dm0, &n));
7602: PetscCall(DMGetNumLabels(dm1, &n1));
7603: eq = (PetscBool)(n == n1);
7604: if (!eq) PetscCall(PetscSNPrintf(msg, sizeof(msg), "Number of labels in dm0 = %" PetscInt_FMT " != %" PetscInt_FMT " = Number of labels in dm1", n, n1));
7605: PetscCallMPI(MPIU_Allreduce(MPI_IN_PLACE, &eq, 1, MPIU_BOOL, MPI_LAND, comm));
7606: if (!eq) goto finish;
7607: }
7608: for (i = 0; i < n; i++) {
7609: DMLabel l0, l1;
7610: const char *name;
7611: char *msgInner;
7613: /* Ignore label order */
7614: PetscCall(DMGetLabelByNum(dm0, i, &l0));
7615: PetscCall(PetscObjectGetName((PetscObject)l0, &name));
7616: PetscCall(DMGetLabel(dm1, name, &l1));
7617: if (!l1) {
7618: PetscCall(PetscSNPrintf(msg, sizeof(msg), "Label \"%s\" (#%" PetscInt_FMT " in dm0) not found in dm1", name, i));
7619: eq = PETSC_FALSE;
7620: break;
7621: }
7622: PetscCall(DMLabelCompare(comm, l0, l1, &eq, &msgInner));
7623: PetscCall(PetscStrncpy(msg, msgInner, sizeof(msg)));
7624: PetscCall(PetscFree(msgInner));
7625: if (!eq) break;
7626: }
7627: PetscCallMPI(MPIU_Allreduce(MPI_IN_PLACE, &eq, 1, MPIU_BOOL, MPI_LAND, comm));
7628: finish:
7629: /* If message output arg not set, print to stderr */
7630: if (message) {
7631: *message = NULL;
7632: if (msg[0]) PetscCall(PetscStrallocpy(msg, message));
7633: } else {
7634: if (msg[0]) PetscCall(PetscSynchronizedFPrintf(comm, PETSC_STDERR, "[%d] %s\n", rank, msg));
7635: PetscCall(PetscSynchronizedFlush(comm, PETSC_STDERR));
7636: }
7637: /* If same output arg not ser and labels are not equal, throw error */
7638: if (equal) *equal = eq;
7639: else PetscCheck(eq, comm, PETSC_ERR_ARG_INCOMP, "DMLabels are not the same in dm0 and dm1");
7640: PetscFunctionReturn(PETSC_SUCCESS);
7641: }
7643: PetscErrorCode DMSetLabelValue_Fast(DM dm, DMLabel *label, const char name[], PetscInt point, PetscInt value)
7644: {
7645: PetscFunctionBegin;
7646: PetscAssertPointer(label, 2);
7647: if (!*label) {
7648: PetscCall(DMCreateLabel(dm, name));
7649: PetscCall(DMGetLabel(dm, name, label));
7650: }
7651: PetscCall(DMLabelSetValue(*label, point, value));
7652: PetscFunctionReturn(PETSC_SUCCESS);
7653: }
7655: /*
7656: Many mesh programs, such as Triangle and TetGen, allow only a single label for each mesh point. Therefore, we would
7657: like to encode all label IDs using a single, universal label. We can do this by assigning an integer to every
7658: (label, id) pair in the DM.
7660: However, a mesh point can have multiple labels, so we must separate all these values. We will assign a bit range to
7661: each label.
7662: */
7663: PetscErrorCode DMUniversalLabelCreate(DM dm, DMUniversalLabel *universal)
7664: {
7665: DMUniversalLabel ul;
7666: PetscBool *active;
7667: PetscInt pStart, pEnd, p, Nl, l, m;
7669: PetscFunctionBegin;
7670: PetscCall(PetscMalloc1(1, &ul));
7671: PetscCall(DMLabelCreate(PETSC_COMM_SELF, "universal", &ul->label));
7672: PetscCall(DMGetNumLabels(dm, &Nl));
7673: PetscCall(PetscCalloc1(Nl, &active));
7674: ul->Nl = 0;
7675: for (l = 0; l < Nl; ++l) {
7676: PetscBool isdepth, iscelltype;
7677: const char *name;
7679: PetscCall(DMGetLabelName(dm, l, &name));
7680: PetscCall(PetscStrncmp(name, "depth", 6, &isdepth));
7681: PetscCall(PetscStrncmp(name, "celltype", 9, &iscelltype));
7682: active[l] = !(isdepth || iscelltype) ? PETSC_TRUE : PETSC_FALSE;
7683: if (active[l]) ++ul->Nl;
7684: }
7685: PetscCall(PetscCalloc5(ul->Nl, &ul->names, ul->Nl, &ul->indices, ul->Nl + 1, &ul->offsets, ul->Nl + 1, &ul->bits, ul->Nl, &ul->masks));
7686: ul->Nv = 0;
7687: for (l = 0, m = 0; l < Nl; ++l) {
7688: DMLabel label;
7689: PetscInt nv;
7690: const char *name;
7692: if (!active[l]) continue;
7693: PetscCall(DMGetLabelName(dm, l, &name));
7694: PetscCall(DMGetLabelByNum(dm, l, &label));
7695: PetscCall(DMLabelGetNumValues(label, &nv));
7696: PetscCall(PetscStrallocpy(name, &ul->names[m]));
7697: ul->indices[m] = l;
7698: ul->Nv += nv;
7699: ul->offsets[m + 1] = nv;
7700: ul->bits[m + 1] = PetscCeilReal(PetscLog2Real(nv + 1));
7701: ++m;
7702: }
7703: for (l = 1; l <= ul->Nl; ++l) {
7704: ul->offsets[l] = ul->offsets[l - 1] + ul->offsets[l];
7705: ul->bits[l] = ul->bits[l - 1] + ul->bits[l];
7706: }
7707: for (l = 0; l < ul->Nl; ++l) {
7708: PetscInt b;
7710: ul->masks[l] = 0;
7711: for (b = ul->bits[l]; b < ul->bits[l + 1]; ++b) ul->masks[l] |= 1 << b;
7712: }
7713: PetscCall(PetscMalloc1(ul->Nv, &ul->values));
7714: for (l = 0, m = 0; l < Nl; ++l) {
7715: DMLabel label;
7716: IS valueIS;
7717: const PetscInt *varr;
7718: PetscInt nv, v;
7720: if (!active[l]) continue;
7721: PetscCall(DMGetLabelByNum(dm, l, &label));
7722: PetscCall(DMLabelGetNumValues(label, &nv));
7723: PetscCall(DMLabelGetValueIS(label, &valueIS));
7724: PetscCall(ISGetIndices(valueIS, &varr));
7725: for (v = 0; v < nv; ++v) ul->values[ul->offsets[m] + v] = varr[v];
7726: PetscCall(ISRestoreIndices(valueIS, &varr));
7727: PetscCall(ISDestroy(&valueIS));
7728: PetscCall(PetscSortInt(nv, &ul->values[ul->offsets[m]]));
7729: ++m;
7730: }
7731: PetscCall(DMPlexGetChart(dm, &pStart, &pEnd));
7732: for (p = pStart; p < pEnd; ++p) {
7733: PetscInt uval = 0;
7734: PetscBool marked = PETSC_FALSE;
7736: for (l = 0, m = 0; l < Nl; ++l) {
7737: DMLabel label;
7738: PetscInt val, defval, loc, nv;
7740: if (!active[l]) continue;
7741: PetscCall(DMGetLabelByNum(dm, l, &label));
7742: PetscCall(DMLabelGetValue(label, p, &val));
7743: PetscCall(DMLabelGetDefaultValue(label, &defval));
7744: if (val == defval) {
7745: ++m;
7746: continue;
7747: }
7748: nv = ul->offsets[m + 1] - ul->offsets[m];
7749: marked = PETSC_TRUE;
7750: PetscCall(PetscFindInt(val, nv, &ul->values[ul->offsets[m]], &loc));
7751: PetscCheck(loc >= 0, PETSC_COMM_SELF, PETSC_ERR_PLIB, "Label value %" PetscInt_FMT " not found in compression array", val);
7752: uval += (loc + 1) << ul->bits[m];
7753: ++m;
7754: }
7755: if (marked) PetscCall(DMLabelSetValue(ul->label, p, uval));
7756: }
7757: PetscCall(PetscFree(active));
7758: *universal = ul;
7759: PetscFunctionReturn(PETSC_SUCCESS);
7760: }
7762: PetscErrorCode DMUniversalLabelDestroy(DMUniversalLabel *universal)
7763: {
7764: PetscInt l;
7766: PetscFunctionBegin;
7767: for (l = 0; l < (*universal)->Nl; ++l) PetscCall(PetscFree((*universal)->names[l]));
7768: PetscCall(DMLabelDestroy(&(*universal)->label));
7769: PetscCall(PetscFree5((*universal)->names, (*universal)->indices, (*universal)->offsets, (*universal)->bits, (*universal)->masks));
7770: PetscCall(PetscFree((*universal)->values));
7771: PetscCall(PetscFree(*universal));
7772: *universal = NULL;
7773: PetscFunctionReturn(PETSC_SUCCESS);
7774: }
7776: PetscErrorCode DMUniversalLabelGetLabel(DMUniversalLabel ul, DMLabel *ulabel)
7777: {
7778: PetscFunctionBegin;
7779: PetscAssertPointer(ulabel, 2);
7780: *ulabel = ul->label;
7781: PetscFunctionReturn(PETSC_SUCCESS);
7782: }
7784: PetscErrorCode DMUniversalLabelCreateLabels(DMUniversalLabel ul, PetscBool preserveOrder, DM dm)
7785: {
7786: PetscInt Nl = ul->Nl, l;
7788: PetscFunctionBegin;
7790: for (l = 0; l < Nl; ++l) {
7791: if (preserveOrder) PetscCall(DMCreateLabelAtIndex(dm, ul->indices[l], ul->names[l]));
7792: else PetscCall(DMCreateLabel(dm, ul->names[l]));
7793: }
7794: if (preserveOrder) {
7795: for (l = 0; l < ul->Nl; ++l) {
7796: const char *name;
7797: PetscBool match;
7799: PetscCall(DMGetLabelName(dm, ul->indices[l], &name));
7800: PetscCall(PetscStrcmp(name, ul->names[l], &match));
7801: PetscCheck(match, PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_WRONG, "Label %" PetscInt_FMT " name %s does not match new name %s", l, name, ul->names[l]);
7802: }
7803: }
7804: PetscFunctionReturn(PETSC_SUCCESS);
7805: }
7807: PetscErrorCode DMUniversalLabelSetLabelValue(DMUniversalLabel ul, DM dm, PetscBool useIndex, PetscInt p, PetscInt value)
7808: {
7809: PetscInt l;
7811: PetscFunctionBegin;
7812: for (l = 0; l < ul->Nl; ++l) {
7813: DMLabel label;
7814: PetscInt lval = (value & ul->masks[l]) >> ul->bits[l];
7816: if (lval) {
7817: if (useIndex) PetscCall(DMGetLabelByNum(dm, ul->indices[l], &label));
7818: else PetscCall(DMGetLabel(dm, ul->names[l], &label));
7819: PetscCall(DMLabelSetValue(label, p, ul->values[ul->offsets[l] + lval - 1]));
7820: }
7821: }
7822: PetscFunctionReturn(PETSC_SUCCESS);
7823: }
7825: /*@
7826: DMGetCoarseDM - Get the coarse `DM`from which this `DM` was obtained by refinement
7828: Not Collective
7830: Input Parameter:
7831: . dm - The `DM` object
7833: Output Parameter:
7834: . cdm - The coarse `DM`
7836: Level: intermediate
7838: .seealso: [](ch_dmbase), `DM`, `DMSetCoarseDM()`, `DMCoarsen()`
7839: @*/
7840: PetscErrorCode DMGetCoarseDM(DM dm, DM *cdm)
7841: {
7842: PetscFunctionBegin;
7844: PetscAssertPointer(cdm, 2);
7845: *cdm = dm->coarseMesh;
7846: PetscFunctionReturn(PETSC_SUCCESS);
7847: }
7849: /*@
7850: DMSetCoarseDM - Set the coarse `DM` from which this `DM` was obtained by refinement
7852: Input Parameters:
7853: + dm - The `DM` object
7854: - cdm - The coarse `DM`
7856: Level: intermediate
7858: Note:
7859: Normally this is set automatically by `DMRefine()`
7861: .seealso: [](ch_dmbase), `DM`, `DMGetCoarseDM()`, `DMCoarsen()`, `DMSetRefine()`, `DMSetFineDM()`
7862: @*/
7863: PetscErrorCode DMSetCoarseDM(DM dm, DM cdm)
7864: {
7865: PetscFunctionBegin;
7868: if (dm == cdm) cdm = NULL;
7869: PetscCall(PetscObjectReference((PetscObject)cdm));
7870: PetscCall(DMDestroy(&dm->coarseMesh));
7871: dm->coarseMesh = cdm;
7872: PetscFunctionReturn(PETSC_SUCCESS);
7873: }
7875: /*@
7876: DMGetFineDM - Get the fine mesh from which this `DM` was obtained by coarsening
7878: Input Parameter:
7879: . dm - The `DM` object
7881: Output Parameter:
7882: . fdm - The fine `DM`
7884: Level: intermediate
7886: .seealso: [](ch_dmbase), `DM`, `DMSetFineDM()`, `DMCoarsen()`, `DMRefine()`
7887: @*/
7888: PetscErrorCode DMGetFineDM(DM dm, DM *fdm)
7889: {
7890: PetscFunctionBegin;
7892: PetscAssertPointer(fdm, 2);
7893: *fdm = dm->fineMesh;
7894: PetscFunctionReturn(PETSC_SUCCESS);
7895: }
7897: /*@
7898: DMSetFineDM - Set the fine mesh from which this was obtained by coarsening
7900: Input Parameters:
7901: + dm - The `DM` object
7902: - fdm - The fine `DM`
7904: Level: developer
7906: Note:
7907: Normally this is set automatically by `DMCoarsen()`
7909: .seealso: [](ch_dmbase), `DM`, `DMGetFineDM()`, `DMCoarsen()`, `DMRefine()`
7910: @*/
7911: PetscErrorCode DMSetFineDM(DM dm, DM fdm)
7912: {
7913: PetscFunctionBegin;
7916: if (dm == fdm) fdm = NULL;
7917: PetscCall(PetscObjectReference((PetscObject)fdm));
7918: PetscCall(DMDestroy(&dm->fineMesh));
7919: dm->fineMesh = fdm;
7920: PetscFunctionReturn(PETSC_SUCCESS);
7921: }
7923: /*@C
7924: DMAddBoundary - Add a boundary condition to a model represented by a `DM`
7926: Collective
7928: Input Parameters:
7929: + dm - The `DM`, with a `PetscDS` that matches the problem being constrained
7930: . type - The type of condition, e.g. `DM_BC_ESSENTIAL_ANALYTIC`, `DM_BC_ESSENTIAL_FIELD` (Dirichlet), or `DM_BC_NATURAL` (Neumann)
7931: . name - The BC name
7932: . label - The label defining constrained points
7933: . Nv - The number of `DMLabel` values for constrained points
7934: . values - An array of values for constrained points
7935: . field - The field to constrain
7936: . Nc - The number of constrained field components (0 will constrain all fields)
7937: . comps - An array of constrained component numbers
7938: . bcFunc - A pointwise function giving boundary values
7939: . bcFunc_t - A pointwise function giving the time deriative of the boundary values, or NULL
7940: - ctx - An optional user context for bcFunc
7942: Output Parameter:
7943: . bd - (Optional) Boundary number
7945: Options Database Keys:
7946: + -bc_<boundary name> <num> - Overrides the boundary ids
7947: - -bc_<boundary name>_comp <num> - Overrides the boundary components
7949: Level: intermediate
7951: Notes:
7952: Both bcFunc and bcFunc_t will depend on the boundary condition type. If the type if `DM_BC_ESSENTIAL`, then the calling sequence is\:
7953: .vb
7954: void bcFunc(PetscInt dim, PetscReal time, const PetscReal x[], PetscInt Nc, PetscScalar bcval[])
7955: .ve
7957: If the type is `DM_BC_ESSENTIAL_FIELD` or other _FIELD value, then the calling sequence is\:
7959: .vb
7960: void bcFunc(PetscInt dim, PetscInt Nf, PetscInt NfAux,
7961: const PetscInt uOff[], const PetscInt uOff_x[], const PetscScalar u[], const PetscScalar u_t[], const PetscScalar u_x[],
7962: const PetscInt aOff[], const PetscInt aOff_x[], const PetscScalar a[], const PetscScalar a_t[], const PetscScalar a_x[],
7963: PetscReal time, const PetscReal x[], PetscScalar bcval[])
7964: .ve
7965: + dim - the spatial dimension
7966: . Nf - the number of fields
7967: . uOff - the offset into u[] and u_t[] for each field
7968: . uOff_x - the offset into u_x[] for each field
7969: . u - each field evaluated at the current point
7970: . u_t - the time derivative of each field evaluated at the current point
7971: . u_x - the gradient of each field evaluated at the current point
7972: . aOff - the offset into a[] and a_t[] for each auxiliary field
7973: . aOff_x - the offset into a_x[] for each auxiliary field
7974: . a - each auxiliary field evaluated at the current point
7975: . a_t - the time derivative of each auxiliary field evaluated at the current point
7976: . a_x - the gradient of auxiliary each field evaluated at the current point
7977: . t - current time
7978: . x - coordinates of the current point
7979: . numConstants - number of constant parameters
7980: . constants - constant parameters
7981: - bcval - output values at the current point
7983: .seealso: [](ch_dmbase), `DM`, `DSGetBoundary()`, `PetscDSAddBoundary()`
7984: @*/
7985: PetscErrorCode DMAddBoundary(DM dm, DMBoundaryConditionType type, const char name[], DMLabel label, PetscInt Nv, const PetscInt values[], PetscInt field, PetscInt Nc, const PetscInt comps[], void (*bcFunc)(void), void (*bcFunc_t)(void), void *ctx, PetscInt *bd)
7986: {
7987: PetscDS ds;
7989: PetscFunctionBegin;
7996: PetscCheck(!dm->localSection, PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_WRONGSTATE, "Cannot add boundary to DM after creating local section");
7997: PetscCall(DMGetDS(dm, &ds));
7998: /* Complete label */
7999: if (label) {
8000: PetscObject obj;
8001: PetscClassId id;
8003: PetscCall(DMGetField(dm, field, NULL, &obj));
8004: PetscCall(PetscObjectGetClassId(obj, &id));
8005: if (id == PETSCFE_CLASSID) {
8006: DM plex;
8008: PetscCall(DMConvert(dm, DMPLEX, &plex));
8009: if (plex) PetscCall(DMPlexLabelComplete(plex, label));
8010: PetscCall(DMDestroy(&plex));
8011: }
8012: }
8013: PetscCall(PetscDSAddBoundary(ds, type, name, label, Nv, values, field, Nc, comps, bcFunc, bcFunc_t, ctx, bd));
8014: PetscFunctionReturn(PETSC_SUCCESS);
8015: }
8017: /* TODO Remove this since now the structures are the same */
8018: static PetscErrorCode DMPopulateBoundary(DM dm)
8019: {
8020: PetscDS ds;
8021: DMBoundary *lastnext;
8022: DSBoundary dsbound;
8024: PetscFunctionBegin;
8025: PetscCall(DMGetDS(dm, &ds));
8026: dsbound = ds->boundary;
8027: if (dm->boundary) {
8028: DMBoundary next = dm->boundary;
8030: /* quick check to see if the PetscDS has changed */
8031: if (next->dsboundary == dsbound) PetscFunctionReturn(PETSC_SUCCESS);
8032: /* the PetscDS has changed: tear down and rebuild */
8033: while (next) {
8034: DMBoundary b = next;
8036: next = b->next;
8037: PetscCall(PetscFree(b));
8038: }
8039: dm->boundary = NULL;
8040: }
8042: lastnext = &dm->boundary;
8043: while (dsbound) {
8044: DMBoundary dmbound;
8046: PetscCall(PetscNew(&dmbound));
8047: dmbound->dsboundary = dsbound;
8048: dmbound->label = dsbound->label;
8049: /* push on the back instead of the front so that it is in the same order as in the PetscDS */
8050: *lastnext = dmbound;
8051: lastnext = &dmbound->next;
8052: dsbound = dsbound->next;
8053: }
8054: PetscFunctionReturn(PETSC_SUCCESS);
8055: }
8057: /* TODO: missing manual page */
8058: PetscErrorCode DMIsBoundaryPoint(DM dm, PetscInt point, PetscBool *isBd)
8059: {
8060: DMBoundary b;
8062: PetscFunctionBegin;
8064: PetscAssertPointer(isBd, 3);
8065: *isBd = PETSC_FALSE;
8066: PetscCall(DMPopulateBoundary(dm));
8067: b = dm->boundary;
8068: while (b && !*isBd) {
8069: DMLabel label = b->label;
8070: DSBoundary dsb = b->dsboundary;
8071: PetscInt i;
8073: if (label) {
8074: for (i = 0; i < dsb->Nv && !*isBd; ++i) PetscCall(DMLabelStratumHasPoint(label, dsb->values[i], point, isBd));
8075: }
8076: b = b->next;
8077: }
8078: PetscFunctionReturn(PETSC_SUCCESS);
8079: }
8081: /*@C
8082: DMProjectFunction - This projects the given function into the function space provided by a `DM`, putting the coefficients in a global vector.
8084: Collective
8086: Input Parameters:
8087: + dm - The `DM`
8088: . time - The time
8089: . funcs - The coordinate functions to evaluate, one per field
8090: . ctxs - Optional array of contexts to pass to each coordinate function. ctxs itself may be null.
8091: - mode - The insertion mode for values
8093: Output Parameter:
8094: . X - vector
8096: Calling sequence of `funcs`:
8097: + dim - The spatial dimension
8098: . time - The time at which to sample
8099: . x - The coordinates
8100: . Nc - The number of components
8101: . u - The output field values
8102: - ctx - optional user-defined function context
8104: Level: developer
8106: Developer Notes:
8107: This API is specific to only particular usage of `DM`
8109: The notes need to provide some information about what has to be provided to the `DM` to be able to perform the computation.
8111: .seealso: [](ch_dmbase), `DM`, `DMProjectFunctionLocal()`, `DMProjectFunctionLabel()`, `DMComputeL2Diff()`
8112: @*/
8113: PetscErrorCode DMProjectFunction(DM dm, PetscReal time, PetscErrorCode (**funcs)(PetscInt dim, PetscReal time, const PetscReal x[], PetscInt Nc, PetscScalar *u, void *ctx), void **ctxs, InsertMode mode, Vec X)
8114: {
8115: Vec localX;
8117: PetscFunctionBegin;
8119: PetscCall(PetscLogEventBegin(DM_ProjectFunction, dm, X, 0, 0));
8120: PetscCall(DMGetLocalVector(dm, &localX));
8121: PetscCall(VecSet(localX, 0.));
8122: PetscCall(DMProjectFunctionLocal(dm, time, funcs, ctxs, mode, localX));
8123: PetscCall(DMLocalToGlobalBegin(dm, localX, mode, X));
8124: PetscCall(DMLocalToGlobalEnd(dm, localX, mode, X));
8125: PetscCall(DMRestoreLocalVector(dm, &localX));
8126: PetscCall(PetscLogEventEnd(DM_ProjectFunction, dm, X, 0, 0));
8127: PetscFunctionReturn(PETSC_SUCCESS);
8128: }
8130: /*@C
8131: DMProjectFunctionLocal - This projects the given function into the function space provided by a `DM`, putting the coefficients in a local vector.
8133: Not Collective
8135: Input Parameters:
8136: + dm - The `DM`
8137: . time - The time
8138: . funcs - The coordinate functions to evaluate, one per field
8139: . ctxs - Optional array of contexts to pass to each coordinate function. ctxs itself may be null.
8140: - mode - The insertion mode for values
8142: Output Parameter:
8143: . localX - vector
8145: Calling sequence of `funcs`:
8146: + dim - The spatial dimension
8147: . time - The current timestep
8148: . x - The coordinates
8149: . Nc - The number of components
8150: . u - The output field values
8151: - ctx - optional user-defined function context
8153: Level: developer
8155: Developer Notes:
8156: This API is specific to only particular usage of `DM`
8158: The notes need to provide some information about what has to be provided to the `DM` to be able to perform the computation.
8160: .seealso: [](ch_dmbase), `DM`, `DMProjectFunction()`, `DMProjectFunctionLabel()`, `DMComputeL2Diff()`
8161: @*/
8162: PetscErrorCode DMProjectFunctionLocal(DM dm, PetscReal time, PetscErrorCode (**funcs)(PetscInt dim, PetscReal time, const PetscReal x[], PetscInt Nc, PetscScalar *u, void *ctx), void **ctxs, InsertMode mode, Vec localX)
8163: {
8164: PetscFunctionBegin;
8167: PetscUseTypeMethod(dm, projectfunctionlocal, time, funcs, ctxs, mode, localX);
8168: PetscFunctionReturn(PETSC_SUCCESS);
8169: }
8171: /*@C
8172: DMProjectFunctionLabel - This projects the given function into the function space provided by the `DM`, putting the coefficients in a global vector, setting values only for points in the given label.
8174: Collective
8176: Input Parameters:
8177: + dm - The `DM`
8178: . time - The time
8179: . numIds - The number of ids
8180: . ids - The ids
8181: . Nc - The number of components
8182: . comps - The components
8183: . label - The `DMLabel` selecting the portion of the mesh for projection
8184: . funcs - The coordinate functions to evaluate, one per field
8185: . ctxs - Optional array of contexts to pass to each coordinate function. ctxs may be null.
8186: - mode - The insertion mode for values
8188: Output Parameter:
8189: . X - vector
8191: Calling sequence of `funcs`:
8192: + dim - The spatial dimension
8193: . time - The current timestep
8194: . x - The coordinates
8195: . Nc - The number of components
8196: . u - The output field values
8197: - ctx - optional user-defined function context
8199: Level: developer
8201: Developer Notes:
8202: This API is specific to only particular usage of `DM`
8204: The notes need to provide some information about what has to be provided to the `DM` to be able to perform the computation.
8206: .seealso: [](ch_dmbase), `DM`, `DMProjectFunction()`, `DMProjectFunctionLocal()`, `DMProjectFunctionLabelLocal()`, `DMComputeL2Diff()`
8207: @*/
8208: PetscErrorCode DMProjectFunctionLabel(DM dm, PetscReal time, DMLabel label, PetscInt numIds, const PetscInt ids[], PetscInt Nc, const PetscInt comps[], PetscErrorCode (**funcs)(PetscInt dim, PetscReal time, const PetscReal x[], PetscInt Nc, PetscScalar *u, void *ctx), void **ctxs, InsertMode mode, Vec X)
8209: {
8210: Vec localX;
8212: PetscFunctionBegin;
8214: PetscCall(DMGetLocalVector(dm, &localX));
8215: PetscCall(VecSet(localX, 0.));
8216: PetscCall(DMProjectFunctionLabelLocal(dm, time, label, numIds, ids, Nc, comps, funcs, ctxs, mode, localX));
8217: PetscCall(DMLocalToGlobalBegin(dm, localX, mode, X));
8218: PetscCall(DMLocalToGlobalEnd(dm, localX, mode, X));
8219: PetscCall(DMRestoreLocalVector(dm, &localX));
8220: PetscFunctionReturn(PETSC_SUCCESS);
8221: }
8223: /*@C
8224: DMProjectFunctionLabelLocal - This projects the given function into the function space provided by the `DM`, putting the coefficients in a local vector, setting values only for points in the given label.
8226: Not Collective
8228: Input Parameters:
8229: + dm - The `DM`
8230: . time - The time
8231: . label - The `DMLabel` selecting the portion of the mesh for projection
8232: . numIds - The number of ids
8233: . ids - The ids
8234: . Nc - The number of components
8235: . comps - The components
8236: . funcs - The coordinate functions to evaluate, one per field
8237: . ctxs - Optional array of contexts to pass to each coordinate function. ctxs itself may be null.
8238: - mode - The insertion mode for values
8240: Output Parameter:
8241: . localX - vector
8243: Calling sequence of `funcs`:
8244: + dim - The spatial dimension
8245: . time - The current time
8246: . x - The coordinates
8247: . Nc - The number of components
8248: . u - The output field values
8249: - ctx - optional user-defined function context
8251: Level: developer
8253: Developer Notes:
8254: This API is specific to only particular usage of `DM`
8256: The notes need to provide some information about what has to be provided to the `DM` to be able to perform the computation.
8258: .seealso: [](ch_dmbase), `DM`, `DMProjectFunction()`, `DMProjectFunctionLocal()`, `DMProjectFunctionLabel()`, `DMComputeL2Diff()`
8259: @*/
8260: PetscErrorCode DMProjectFunctionLabelLocal(DM dm, PetscReal time, DMLabel label, PetscInt numIds, const PetscInt ids[], PetscInt Nc, const PetscInt comps[], PetscErrorCode (**funcs)(PetscInt dim, PetscReal time, const PetscReal x[], PetscInt Nc, PetscScalar *u, void *ctx), void **ctxs, InsertMode mode, Vec localX)
8261: {
8262: PetscFunctionBegin;
8265: PetscUseTypeMethod(dm, projectfunctionlabellocal, time, label, numIds, ids, Nc, comps, funcs, ctxs, mode, localX);
8266: PetscFunctionReturn(PETSC_SUCCESS);
8267: }
8269: /*@C
8270: DMProjectFieldLocal - This projects the given function of the input fields into the function space provided by the `DM`, putting the coefficients in a local vector.
8272: Not Collective
8274: Input Parameters:
8275: + dm - The `DM`
8276: . time - The time
8277: . localU - The input field vector; may be `NULL` if projection is defined purely by coordinates
8278: . funcs - The functions to evaluate, one per field
8279: - mode - The insertion mode for values
8281: Output Parameter:
8282: . localX - The output vector
8284: Calling sequence of `funcs`:
8285: + dim - The spatial dimension
8286: . Nf - The number of input fields
8287: . NfAux - The number of input auxiliary fields
8288: . uOff - The offset of each field in u[]
8289: . uOff_x - The offset of each field in u_x[]
8290: . u - The field values at this point in space
8291: . u_t - The field time derivative at this point in space (or NULL)
8292: . u_x - The field derivatives at this point in space
8293: . aOff - The offset of each auxiliary field in u[]
8294: . aOff_x - The offset of each auxiliary field in u_x[]
8295: . a - The auxiliary field values at this point in space
8296: . a_t - The auxiliary field time derivative at this point in space (or NULL)
8297: . a_x - The auxiliary field derivatives at this point in space
8298: . t - The current time
8299: . x - The coordinates of this point
8300: . numConstants - The number of constants
8301: . constants - The value of each constant
8302: - f - The value of the function at this point in space
8304: Level: intermediate
8306: Note:
8307: There are three different `DM`s that potentially interact in this function. The output `DM`, dm, specifies the layout of the values calculates by funcs.
8308: The input `DM`, attached to U, may be different. For example, you can input the solution over the full domain, but output over a piece of the boundary, or
8309: a subdomain. You can also output a different number of fields than the input, with different discretizations. Last the auxiliary `DM`, attached to the
8310: auxiliary field vector, which is attached to dm, can also be different. It can have a different topology, number of fields, and discretizations.
8312: Developer Notes:
8313: This API is specific to only particular usage of `DM`
8315: The notes need to provide some information about what has to be provided to the `DM` to be able to perform the computation.
8317: .seealso: [](ch_dmbase), `DM`, `DMProjectField()`, `DMProjectFieldLabelLocal()`,
8318: `DMProjectFunction()`, `DMComputeL2Diff()`
8319: @*/
8320: PetscErrorCode DMProjectFieldLocal(DM dm, PetscReal time, Vec localU, void (**funcs)(PetscInt dim, PetscInt Nf, PetscInt NfAux, const PetscInt uOff[], const PetscInt uOff_x[], const PetscScalar u[], const PetscScalar u_t[], const PetscScalar u_x[], const PetscInt aOff[], const PetscInt aOff_x[], const PetscScalar a[], const PetscScalar a_t[], const PetscScalar a_x[], PetscReal t, const PetscReal x[], PetscInt numConstants, const PetscScalar constants[], PetscScalar f[]), InsertMode mode, Vec localX)
8321: {
8322: PetscFunctionBegin;
8326: PetscUseTypeMethod(dm, projectfieldlocal, time, localU, funcs, mode, localX);
8327: PetscFunctionReturn(PETSC_SUCCESS);
8328: }
8330: /*@C
8331: DMProjectFieldLabelLocal - This projects the given function of the input fields into the function space provided, putting the coefficients in a local vector, calculating only over the portion of the domain specified by the label.
8333: Not Collective
8335: Input Parameters:
8336: + dm - The `DM`
8337: . time - The time
8338: . label - The `DMLabel` marking the portion of the domain to output
8339: . numIds - The number of label ids to use
8340: . ids - The label ids to use for marking
8341: . Nc - The number of components to set in the output, or `PETSC_DETERMINE` for all components
8342: . comps - The components to set in the output, or `NULL` for all components
8343: . localU - The input field vector
8344: . funcs - The functions to evaluate, one per field
8345: - mode - The insertion mode for values
8347: Output Parameter:
8348: . localX - The output vector
8350: Calling sequence of `funcs`:
8351: + dim - The spatial dimension
8352: . Nf - The number of input fields
8353: . NfAux - The number of input auxiliary fields
8354: . uOff - The offset of each field in u[]
8355: . uOff_x - The offset of each field in u_x[]
8356: . u - The field values at this point in space
8357: . u_t - The field time derivative at this point in space (or NULL)
8358: . u_x - The field derivatives at this point in space
8359: . aOff - The offset of each auxiliary field in u[]
8360: . aOff_x - The offset of each auxiliary field in u_x[]
8361: . a - The auxiliary field values at this point in space
8362: . a_t - The auxiliary field time derivative at this point in space (or NULL)
8363: . a_x - The auxiliary field derivatives at this point in space
8364: . t - The current time
8365: . x - The coordinates of this point
8366: . numConstants - The number of constants
8367: . constants - The value of each constant
8368: - f - The value of the function at this point in space
8370: Level: intermediate
8372: Note:
8373: There are three different `DM`s that potentially interact in this function. The output `DM`, dm, specifies the layout of the values calculates by funcs.
8374: The input `DM`, attached to localU, may be different. For example, you can input the solution over the full domain, but output over a piece of the boundary, or
8375: a subdomain. You can also output a different number of fields than the input, with different discretizations. Last the auxiliary `DM`, attached to the
8376: auxiliary field vector, which is attached to dm, can also be different. It can have a different topology, number of fields, and discretizations.
8378: Developer Notes:
8379: This API is specific to only particular usage of `DM`
8381: The notes need to provide some information about what has to be provided to the `DM` to be able to perform the computation.
8383: .seealso: [](ch_dmbase), `DM`, `DMProjectField()`, `DMProjectFieldLabel()`, `DMProjectFunction()`, `DMComputeL2Diff()`
8384: @*/
8385: PetscErrorCode DMProjectFieldLabelLocal(DM dm, PetscReal time, DMLabel label, PetscInt numIds, const PetscInt ids[], PetscInt Nc, const PetscInt comps[], Vec localU, void (**funcs)(PetscInt dim, PetscInt Nf, PetscInt NfAux, const PetscInt uOff[], const PetscInt uOff_x[], const PetscScalar u[], const PetscScalar u_t[], const PetscScalar u_x[], const PetscInt aOff[], const PetscInt aOff_x[], const PetscScalar a[], const PetscScalar a_t[], const PetscScalar a_x[], PetscReal t, const PetscReal x[], PetscInt numConstants, const PetscScalar constants[], PetscScalar f[]), InsertMode mode, Vec localX)
8386: {
8387: PetscFunctionBegin;
8391: PetscUseTypeMethod(dm, projectfieldlabellocal, time, label, numIds, ids, Nc, comps, localU, funcs, mode, localX);
8392: PetscFunctionReturn(PETSC_SUCCESS);
8393: }
8395: /*@C
8396: DMProjectFieldLabel - This projects the given function of the input fields into the function space provided, putting the coefficients in a global vector, calculating only over the portion of the domain specified by the label.
8398: Not Collective
8400: Input Parameters:
8401: + dm - The `DM`
8402: . time - The time
8403: . label - The `DMLabel` marking the portion of the domain to output
8404: . numIds - The number of label ids to use
8405: . ids - The label ids to use for marking
8406: . Nc - The number of components to set in the output, or `PETSC_DETERMINE` for all components
8407: . comps - The components to set in the output, or `NULL` for all components
8408: . U - The input field vector
8409: . funcs - The functions to evaluate, one per field
8410: - mode - The insertion mode for values
8412: Output Parameter:
8413: . X - The output vector
8415: Calling sequence of `funcs`:
8416: + dim - The spatial dimension
8417: . Nf - The number of input fields
8418: . NfAux - The number of input auxiliary fields
8419: . uOff - The offset of each field in u[]
8420: . uOff_x - The offset of each field in u_x[]
8421: . u - The field values at this point in space
8422: . u_t - The field time derivative at this point in space (or NULL)
8423: . u_x - The field derivatives at this point in space
8424: . aOff - The offset of each auxiliary field in u[]
8425: . aOff_x - The offset of each auxiliary field in u_x[]
8426: . a - The auxiliary field values at this point in space
8427: . a_t - The auxiliary field time derivative at this point in space (or NULL)
8428: . a_x - The auxiliary field derivatives at this point in space
8429: . t - The current time
8430: . x - The coordinates of this point
8431: . numConstants - The number of constants
8432: . constants - The value of each constant
8433: - f - The value of the function at this point in space
8435: Level: intermediate
8437: Note:
8438: There are three different `DM`s that potentially interact in this function. The output `DM`, dm, specifies the layout of the values calculates by funcs.
8439: The input `DM`, attached to U, may be different. For example, you can input the solution over the full domain, but output over a piece of the boundary, or
8440: a subdomain. You can also output a different number of fields than the input, with different discretizations. Last the auxiliary `DM`, attached to the
8441: auxiliary field vector, which is attached to dm, can also be different. It can have a different topology, number of fields, and discretizations.
8443: Developer Notes:
8444: This API is specific to only particular usage of `DM`
8446: The notes need to provide some information about what has to be provided to the `DM` to be able to perform the computation.
8448: .seealso: [](ch_dmbase), `DM`, `DMProjectField()`, `DMProjectFieldLabelLocal()`, `DMProjectFunction()`, `DMComputeL2Diff()`
8449: @*/
8450: PetscErrorCode DMProjectFieldLabel(DM dm, PetscReal time, DMLabel label, PetscInt numIds, const PetscInt ids[], PetscInt Nc, const PetscInt comps[], Vec U, void (**funcs)(PetscInt dim, PetscInt Nf, PetscInt NfAux, const PetscInt uOff[], const PetscInt uOff_x[], const PetscScalar u[], const PetscScalar u_t[], const PetscScalar u_x[], const PetscInt aOff[], const PetscInt aOff_x[], const PetscScalar a[], const PetscScalar a_t[], const PetscScalar a_x[], PetscReal t, const PetscReal x[], PetscInt numConstants, const PetscScalar constants[], PetscScalar f[]), InsertMode mode, Vec X)
8451: {
8452: DM dmIn;
8453: Vec localU, localX;
8455: PetscFunctionBegin;
8457: PetscCall(VecGetDM(U, &dmIn));
8458: PetscCall(DMGetLocalVector(dmIn, &localU));
8459: PetscCall(DMGetLocalVector(dm, &localX));
8460: PetscCall(VecSet(localX, 0.));
8461: PetscCall(DMGlobalToLocalBegin(dmIn, U, mode, localU));
8462: PetscCall(DMGlobalToLocalEnd(dmIn, U, mode, localU));
8463: PetscCall(DMProjectFieldLabelLocal(dm, time, label, numIds, ids, Nc, comps, localU, funcs, mode, localX));
8464: PetscCall(DMLocalToGlobalBegin(dm, localX, mode, X));
8465: PetscCall(DMLocalToGlobalEnd(dm, localX, mode, X));
8466: PetscCall(DMRestoreLocalVector(dm, &localX));
8467: PetscCall(DMRestoreLocalVector(dmIn, &localU));
8468: PetscFunctionReturn(PETSC_SUCCESS);
8469: }
8471: /*@C
8472: DMProjectBdFieldLabelLocal - This projects the given function of the input fields into the function space provided, putting the coefficients in a local vector, calculating only over the portion of the domain boundary specified by the label.
8474: Not Collective
8476: Input Parameters:
8477: + dm - The `DM`
8478: . time - The time
8479: . label - The `DMLabel` marking the portion of the domain boundary to output
8480: . numIds - The number of label ids to use
8481: . ids - The label ids to use for marking
8482: . Nc - The number of components to set in the output, or `PETSC_DETERMINE` for all components
8483: . comps - The components to set in the output, or `NULL` for all components
8484: . localU - The input field vector
8485: . funcs - The functions to evaluate, one per field
8486: - mode - The insertion mode for values
8488: Output Parameter:
8489: . localX - The output vector
8491: Calling sequence of `funcs`:
8492: + dim - The spatial dimension
8493: . Nf - The number of input fields
8494: . NfAux - The number of input auxiliary fields
8495: . uOff - The offset of each field in u[]
8496: . uOff_x - The offset of each field in u_x[]
8497: . u - The field values at this point in space
8498: . u_t - The field time derivative at this point in space (or NULL)
8499: . u_x - The field derivatives at this point in space
8500: . aOff - The offset of each auxiliary field in u[]
8501: . aOff_x - The offset of each auxiliary field in u_x[]
8502: . a - The auxiliary field values at this point in space
8503: . a_t - The auxiliary field time derivative at this point in space (or NULL)
8504: . a_x - The auxiliary field derivatives at this point in space
8505: . t - The current time
8506: . x - The coordinates of this point
8507: . n - The face normal
8508: . numConstants - The number of constants
8509: . constants - The value of each constant
8510: - f - The value of the function at this point in space
8512: Level: intermediate
8514: Note:
8515: There are three different `DM`s that potentially interact in this function. The output `DM`, dm, specifies the layout of the values calculates by funcs.
8516: The input `DM`, attached to U, may be different. For example, you can input the solution over the full domain, but output over a piece of the boundary, or
8517: a subdomain. You can also output a different number of fields than the input, with different discretizations. Last the auxiliary `DM`, attached to the
8518: auxiliary field vector, which is attached to dm, can also be different. It can have a different topology, number of fields, and discretizations.
8520: Developer Notes:
8521: This API is specific to only particular usage of `DM`
8523: The notes need to provide some information about what has to be provided to the `DM` to be able to perform the computation.
8525: .seealso: [](ch_dmbase), `DM`, `DMProjectField()`, `DMProjectFieldLabelLocal()`, `DMProjectFunction()`, `DMComputeL2Diff()`
8526: @*/
8527: PetscErrorCode DMProjectBdFieldLabelLocal(DM dm, PetscReal time, DMLabel label, PetscInt numIds, const PetscInt ids[], PetscInt Nc, const PetscInt comps[], Vec localU, void (**funcs)(PetscInt dim, PetscInt Nf, PetscInt NfAux, const PetscInt uOff[], const PetscInt uOff_x[], const PetscScalar u[], const PetscScalar u_t[], const PetscScalar u_x[], const PetscInt aOff[], const PetscInt aOff_x[], const PetscScalar a[], const PetscScalar a_t[], const PetscScalar a_x[], PetscReal t, const PetscReal x[], const PetscReal n[], PetscInt numConstants, const PetscScalar constants[], PetscScalar f[]), InsertMode mode, Vec localX)
8528: {
8529: PetscFunctionBegin;
8533: PetscUseTypeMethod(dm, projectbdfieldlabellocal, time, label, numIds, ids, Nc, comps, localU, funcs, mode, localX);
8534: PetscFunctionReturn(PETSC_SUCCESS);
8535: }
8537: /*@C
8538: DMComputeL2Diff - This function computes the L_2 difference between a function u and an FEM interpolant solution u_h.
8540: Collective
8542: Input Parameters:
8543: + dm - The `DM`
8544: . time - The time
8545: . funcs - The functions to evaluate for each field component
8546: . ctxs - Optional array of contexts to pass to each function, or NULL.
8547: - X - The coefficient vector u_h, a global vector
8549: Output Parameter:
8550: . diff - The diff ||u - u_h||_2
8552: Level: developer
8554: Developer Notes:
8555: This API is specific to only particular usage of `DM`
8557: The notes need to provide some information about what has to be provided to the `DM` to be able to perform the computation.
8559: .seealso: [](ch_dmbase), `DM`, `DMProjectFunction()`, `DMComputeL2FieldDiff()`, `DMComputeL2GradientDiff()`
8560: @*/
8561: PetscErrorCode DMComputeL2Diff(DM dm, PetscReal time, PetscErrorCode (**funcs)(PetscInt, PetscReal, const PetscReal[], PetscInt, PetscScalar *, void *), void **ctxs, Vec X, PetscReal *diff)
8562: {
8563: PetscFunctionBegin;
8566: PetscUseTypeMethod(dm, computel2diff, time, funcs, ctxs, X, diff);
8567: PetscFunctionReturn(PETSC_SUCCESS);
8568: }
8570: /*@C
8571: DMComputeL2GradientDiff - This function computes the L_2 difference between the gradient of a function u and an FEM interpolant solution grad u_h.
8573: Collective
8575: Input Parameters:
8576: + dm - The `DM`
8577: . time - The time
8578: . funcs - The gradient functions to evaluate for each field component
8579: . ctxs - Optional array of contexts to pass to each function, or NULL.
8580: . X - The coefficient vector u_h, a global vector
8581: - n - The vector to project along
8583: Output Parameter:
8584: . diff - The diff ||(grad u - grad u_h) . n||_2
8586: Level: developer
8588: Developer Notes:
8589: This API is specific to only particular usage of `DM`
8591: The notes need to provide some information about what has to be provided to the `DM` to be able to perform the computation.
8593: .seealso: [](ch_dmbase), `DM`, `DMProjectFunction()`, `DMComputeL2Diff()`, `DMComputeL2FieldDiff()`
8594: @*/
8595: PetscErrorCode DMComputeL2GradientDiff(DM dm, PetscReal time, PetscErrorCode (**funcs)(PetscInt, PetscReal, const PetscReal[], const PetscReal[], PetscInt, PetscScalar *, void *), void **ctxs, Vec X, const PetscReal n[], PetscReal *diff)
8596: {
8597: PetscFunctionBegin;
8600: PetscUseTypeMethod(dm, computel2gradientdiff, time, funcs, ctxs, X, n, diff);
8601: PetscFunctionReturn(PETSC_SUCCESS);
8602: }
8604: /*@C
8605: DMComputeL2FieldDiff - This function computes the L_2 difference between a function u and an FEM interpolant solution u_h, separated into field components.
8607: Collective
8609: Input Parameters:
8610: + dm - The `DM`
8611: . time - The time
8612: . funcs - The functions to evaluate for each field component
8613: . ctxs - Optional array of contexts to pass to each function, or NULL.
8614: - X - The coefficient vector u_h, a global vector
8616: Output Parameter:
8617: . diff - The array of differences, ||u^f - u^f_h||_2
8619: Level: developer
8621: Developer Notes:
8622: This API is specific to only particular usage of `DM`
8624: The notes need to provide some information about what has to be provided to the `DM` to be able to perform the computation.
8626: .seealso: [](ch_dmbase), `DM`, `DMProjectFunction()`, `DMComputeL2GradientDiff()`
8627: @*/
8628: PetscErrorCode DMComputeL2FieldDiff(DM dm, PetscReal time, PetscErrorCode (**funcs)(PetscInt, PetscReal, const PetscReal[], PetscInt, PetscScalar *, void *), void **ctxs, Vec X, PetscReal diff[])
8629: {
8630: PetscFunctionBegin;
8633: PetscUseTypeMethod(dm, computel2fielddiff, time, funcs, ctxs, X, diff);
8634: PetscFunctionReturn(PETSC_SUCCESS);
8635: }
8637: /*@C
8638: DMGetNeighbors - Gets an array containing the MPI ranks of all the processes neighbors
8640: Not Collective
8642: Input Parameter:
8643: . dm - The `DM`
8645: Output Parameters:
8646: + nranks - the number of neighbours
8647: - ranks - the neighbors ranks
8649: Level: beginner
8651: Note:
8652: Do not free the array, it is freed when the `DM` is destroyed.
8654: .seealso: [](ch_dmbase), `DM`, `DMDAGetNeighbors()`, `PetscSFGetRootRanks()`
8655: @*/
8656: PetscErrorCode DMGetNeighbors(DM dm, PetscInt *nranks, const PetscMPIInt *ranks[])
8657: {
8658: PetscFunctionBegin;
8660: PetscUseTypeMethod(dm, getneighbors, nranks, ranks);
8661: PetscFunctionReturn(PETSC_SUCCESS);
8662: }
8664: #include <petsc/private/matimpl.h>
8666: /*
8667: Converts the input vector to a ghosted vector and then calls the standard coloring code.
8668: This must be a different function because it requires DM which is not defined in the Mat library
8669: */
8670: static PetscErrorCode MatFDColoringApply_AIJDM(Mat J, MatFDColoring coloring, Vec x1, void *sctx)
8671: {
8672: PetscFunctionBegin;
8673: if (coloring->ctype == IS_COLORING_LOCAL) {
8674: Vec x1local;
8675: DM dm;
8676: PetscCall(MatGetDM(J, &dm));
8677: PetscCheck(dm, PetscObjectComm((PetscObject)J), PETSC_ERR_ARG_INCOMP, "IS_COLORING_LOCAL requires a DM");
8678: PetscCall(DMGetLocalVector(dm, &x1local));
8679: PetscCall(DMGlobalToLocalBegin(dm, x1, INSERT_VALUES, x1local));
8680: PetscCall(DMGlobalToLocalEnd(dm, x1, INSERT_VALUES, x1local));
8681: x1 = x1local;
8682: }
8683: PetscCall(MatFDColoringApply_AIJ(J, coloring, x1, sctx));
8684: if (coloring->ctype == IS_COLORING_LOCAL) {
8685: DM dm;
8686: PetscCall(MatGetDM(J, &dm));
8687: PetscCall(DMRestoreLocalVector(dm, &x1));
8688: }
8689: PetscFunctionReturn(PETSC_SUCCESS);
8690: }
8692: /*@
8693: MatFDColoringUseDM - allows a `MatFDColoring` object to use the `DM` associated with the matrix to compute a `IS_COLORING_LOCAL` coloring
8695: Input Parameters:
8696: + coloring - The matrix to get the `DM` from
8697: - fdcoloring - the `MatFDColoring` object
8699: Level: advanced
8701: Developer Note:
8702: This routine exists because the PETSc `Mat` library does not know about the `DM` objects
8704: .seealso: [](ch_dmbase), `DM`, `MatFDColoring`, `MatFDColoringCreate()`, `ISColoringType`
8705: @*/
8706: PetscErrorCode MatFDColoringUseDM(Mat coloring, MatFDColoring fdcoloring)
8707: {
8708: PetscFunctionBegin;
8709: coloring->ops->fdcoloringapply = MatFDColoringApply_AIJDM;
8710: PetscFunctionReturn(PETSC_SUCCESS);
8711: }
8713: /*@
8714: DMGetCompatibility - determine if two `DM`s are compatible
8716: Collective
8718: Input Parameters:
8719: + dm1 - the first `DM`
8720: - dm2 - the second `DM`
8722: Output Parameters:
8723: + compatible - whether or not the two `DM`s are compatible
8724: - set - whether or not the compatible value was actually determined and set
8726: Level: advanced
8728: Notes:
8729: Two `DM`s are deemed compatible if they represent the same parallel decomposition
8730: of the same topology. This implies that the section (field data) on one
8731: "makes sense" with respect to the topology and parallel decomposition of the other.
8732: Loosely speaking, compatible `DM`s represent the same domain and parallel
8733: decomposition, but hold different data.
8735: Typically, one would confirm compatibility if intending to simultaneously iterate
8736: over a pair of vectors obtained from different `DM`s.
8738: For example, two `DMDA` objects are compatible if they have the same local
8739: and global sizes and the same stencil width. They can have different numbers
8740: of degrees of freedom per node. Thus, one could use the node numbering from
8741: either `DM` in bounds for a loop over vectors derived from either `DM`.
8743: Consider the operation of summing data living on a 2-dof `DMDA` to data living
8744: on a 1-dof `DMDA`, which should be compatible, as in the following snippet.
8745: .vb
8746: ...
8747: PetscCall(DMGetCompatibility(da1,da2,&compatible,&set));
8748: if (set && compatible) {
8749: PetscCall(DMDAVecGetArrayDOF(da1,vec1,&arr1));
8750: PetscCall(DMDAVecGetArrayDOF(da2,vec2,&arr2));
8751: PetscCall(DMDAGetCorners(da1,&x,&y,NULL,&m,&n,NULL));
8752: for (j=y; j<y+n; ++j) {
8753: for (i=x; i<x+m, ++i) {
8754: arr1[j][i][0] = arr2[j][i][0] + arr2[j][i][1];
8755: }
8756: }
8757: PetscCall(DMDAVecRestoreArrayDOF(da1,vec1,&arr1));
8758: PetscCall(DMDAVecRestoreArrayDOF(da2,vec2,&arr2));
8759: } else {
8760: SETERRQ(PetscObjectComm((PetscObject)da1,PETSC_ERR_ARG_INCOMP,"DMDA objects incompatible");
8761: }
8762: ...
8763: .ve
8765: Checking compatibility might be expensive for a given implementation of `DM`,
8766: or might be impossible to unambiguously confirm or deny. For this reason,
8767: this function may decline to determine compatibility, and hence users should
8768: always check the "set" output parameter.
8770: A `DM` is always compatible with itself.
8772: In the current implementation, `DM`s which live on "unequal" communicators
8773: (MPI_UNEQUAL in the terminology of MPI_Comm_compare()) are always deemed
8774: incompatible.
8776: This function is labeled "Collective," as information about all subdomains
8777: is required on each rank. However, in `DM` implementations which store all this
8778: information locally, this function may be merely "Logically Collective".
8780: Developer Note:
8781: Compatibility is assumed to be a symmetric concept; `DM` A is compatible with `DM` B
8782: iff B is compatible with A. Thus, this function checks the implementations
8783: of both dm and dmc (if they are of different types), attempting to determine
8784: compatibility. It is left to `DM` implementers to ensure that symmetry is
8785: preserved. The simplest way to do this is, when implementing type-specific
8786: logic for this function, is to check for existing logic in the implementation
8787: of other `DM` types and let *set = PETSC_FALSE if found.
8789: .seealso: [](ch_dmbase), `DM`, `DMDACreateCompatibleDMDA()`, `DMStagCreateCompatibleDMStag()`
8790: @*/
8791: PetscErrorCode DMGetCompatibility(DM dm1, DM dm2, PetscBool *compatible, PetscBool *set)
8792: {
8793: PetscMPIInt compareResult;
8794: DMType type, type2;
8795: PetscBool sameType;
8797: PetscFunctionBegin;
8801: /* Declare a DM compatible with itself */
8802: if (dm1 == dm2) {
8803: *set = PETSC_TRUE;
8804: *compatible = PETSC_TRUE;
8805: PetscFunctionReturn(PETSC_SUCCESS);
8806: }
8808: /* Declare a DM incompatible with a DM that lives on an "unequal"
8809: communicator. Note that this does not preclude compatibility with
8810: DMs living on "congruent" or "similar" communicators, but this must be
8811: determined by the implementation-specific logic */
8812: PetscCallMPI(MPI_Comm_compare(PetscObjectComm((PetscObject)dm1), PetscObjectComm((PetscObject)dm2), &compareResult));
8813: if (compareResult == MPI_UNEQUAL) {
8814: *set = PETSC_TRUE;
8815: *compatible = PETSC_FALSE;
8816: PetscFunctionReturn(PETSC_SUCCESS);
8817: }
8819: /* Pass to the implementation-specific routine, if one exists. */
8820: if (dm1->ops->getcompatibility) {
8821: PetscUseTypeMethod(dm1, getcompatibility, dm2, compatible, set);
8822: if (*set) PetscFunctionReturn(PETSC_SUCCESS);
8823: }
8825: /* If dm1 and dm2 are of different types, then attempt to check compatibility
8826: with an implementation of this function from dm2 */
8827: PetscCall(DMGetType(dm1, &type));
8828: PetscCall(DMGetType(dm2, &type2));
8829: PetscCall(PetscStrcmp(type, type2, &sameType));
8830: if (!sameType && dm2->ops->getcompatibility) {
8831: PetscUseTypeMethod(dm2, getcompatibility, dm1, compatible, set); /* Note argument order */
8832: } else {
8833: *set = PETSC_FALSE;
8834: }
8835: PetscFunctionReturn(PETSC_SUCCESS);
8836: }
8838: /*@C
8839: DMMonitorSet - Sets an additional monitor function that is to be used after a solve to monitor discretization performance.
8841: Logically Collective
8843: Input Parameters:
8844: + dm - the `DM`
8845: . f - the monitor function
8846: . mctx - [optional] user-defined context for private data for the monitor routine (use `NULL` if no context is desired)
8847: - monitordestroy - [optional] routine that frees monitor context (may be `NULL`), see `PetscCtxDestroyFn` for the calling sequence
8849: Options Database Key:
8850: . -dm_monitor_cancel - cancels all monitors that have been hardwired into a code by calls to `DMMonitorSet()`, but
8851: does not cancel those set via the options database.
8853: Level: intermediate
8855: Note:
8856: Several different monitoring routines may be set by calling
8857: `DMMonitorSet()` multiple times or with `DMMonitorSetFromOptions()`; all will be called in the
8858: order in which they were set.
8860: Fortran Note:
8861: Only a single monitor function can be set for each `DM` object
8863: Developer Note:
8864: This API has a generic name but seems specific to a very particular aspect of the use of `DM`
8866: .seealso: [](ch_dmbase), `DM`, `DMMonitorCancel()`, `DMMonitorSetFromOptions()`, `DMMonitor()`, `PetscCtxDestroyFn`
8867: @*/
8868: PetscErrorCode DMMonitorSet(DM dm, PetscErrorCode (*f)(DM, void *), void *mctx, PetscCtxDestroyFn *monitordestroy)
8869: {
8870: PetscInt m;
8872: PetscFunctionBegin;
8874: for (m = 0; m < dm->numbermonitors; ++m) {
8875: PetscBool identical;
8877: PetscCall(PetscMonitorCompare((PetscErrorCode (*)(void))f, mctx, monitordestroy, (PetscErrorCode (*)(void))dm->monitor[m], dm->monitorcontext[m], dm->monitordestroy[m], &identical));
8878: if (identical) PetscFunctionReturn(PETSC_SUCCESS);
8879: }
8880: PetscCheck(dm->numbermonitors < MAXDMMONITORS, PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "Too many monitors set");
8881: dm->monitor[dm->numbermonitors] = f;
8882: dm->monitordestroy[dm->numbermonitors] = monitordestroy;
8883: dm->monitorcontext[dm->numbermonitors++] = mctx;
8884: PetscFunctionReturn(PETSC_SUCCESS);
8885: }
8887: /*@
8888: DMMonitorCancel - Clears all the monitor functions for a `DM` object.
8890: Logically Collective
8892: Input Parameter:
8893: . dm - the DM
8895: Options Database Key:
8896: . -dm_monitor_cancel - cancels all monitors that have been hardwired
8897: into a code by calls to `DMonitorSet()`, but does not cancel those
8898: set via the options database
8900: Level: intermediate
8902: Note:
8903: There is no way to clear one specific monitor from a `DM` object.
8905: .seealso: [](ch_dmbase), `DM`, `DMMonitorSet()`, `DMMonitorSetFromOptions()`, `DMMonitor()`
8906: @*/
8907: PetscErrorCode DMMonitorCancel(DM dm)
8908: {
8909: PetscInt m;
8911: PetscFunctionBegin;
8913: for (m = 0; m < dm->numbermonitors; ++m) {
8914: if (dm->monitordestroy[m]) PetscCall((*dm->monitordestroy[m])(&dm->monitorcontext[m]));
8915: }
8916: dm->numbermonitors = 0;
8917: PetscFunctionReturn(PETSC_SUCCESS);
8918: }
8920: /*@C
8921: DMMonitorSetFromOptions - Sets a monitor function and viewer appropriate for the type indicated by the user
8923: Collective
8925: Input Parameters:
8926: + dm - `DM` object you wish to monitor
8927: . name - the monitor type one is seeking
8928: . help - message indicating what monitoring is done
8929: . manual - manual page for the monitor
8930: . monitor - the monitor function, this must use a `PetscViewerFormat` as its context
8931: - monitorsetup - a function that is called once ONLY if the user selected this monitor that may set additional features of the `DM` or `PetscViewer` objects
8933: Output Parameter:
8934: . flg - Flag set if the monitor was created
8936: Level: developer
8938: .seealso: [](ch_dmbase), `DM`, `PetscOptionsCreateViewer()`, `PetscOptionsGetReal()`, `PetscOptionsHasName()`, `PetscOptionsGetString()`,
8939: `PetscOptionsGetIntArray()`, `PetscOptionsGetRealArray()`, `PetscOptionsBool()`
8940: `PetscOptionsInt()`, `PetscOptionsString()`, `PetscOptionsReal()`,
8941: `PetscOptionsName()`, `PetscOptionsBegin()`, `PetscOptionsEnd()`, `PetscOptionsHeadBegin()`,
8942: `PetscOptionsStringArray()`, `PetscOptionsRealArray()`, `PetscOptionsScalar()`,
8943: `PetscOptionsBoolGroupBegin()`, `PetscOptionsBoolGroup()`, `PetscOptionsBoolGroupEnd()`,
8944: `PetscOptionsFList()`, `PetscOptionsEList()`, `DMMonitor()`, `DMMonitorSet()`
8945: @*/
8946: PetscErrorCode DMMonitorSetFromOptions(DM dm, const char name[], const char help[], const char manual[], PetscErrorCode (*monitor)(DM, void *), PetscErrorCode (*monitorsetup)(DM, PetscViewerAndFormat *), PetscBool *flg)
8947: {
8948: PetscViewer viewer;
8949: PetscViewerFormat format;
8951: PetscFunctionBegin;
8953: PetscCall(PetscOptionsCreateViewer(PetscObjectComm((PetscObject)dm), ((PetscObject)dm)->options, ((PetscObject)dm)->prefix, name, &viewer, &format, flg));
8954: if (*flg) {
8955: PetscViewerAndFormat *vf;
8957: PetscCall(PetscViewerAndFormatCreate(viewer, format, &vf));
8958: PetscCall(PetscViewerDestroy(&viewer));
8959: if (monitorsetup) PetscCall((*monitorsetup)(dm, vf));
8960: PetscCall(DMMonitorSet(dm, monitor, vf, (PetscCtxDestroyFn *)PetscViewerAndFormatDestroy));
8961: }
8962: PetscFunctionReturn(PETSC_SUCCESS);
8963: }
8965: /*@
8966: DMMonitor - runs the user provided monitor routines, if they exist
8968: Collective
8970: Input Parameter:
8971: . dm - The `DM`
8973: Level: developer
8975: Developer Note:
8976: Note should indicate when during the life of the `DM` the monitor is run. It appears to be
8977: related to the discretization process seems rather specialized since some `DM` have no
8978: concept of discretization.
8980: .seealso: [](ch_dmbase), `DM`, `DMMonitorSet()`, `DMMonitorSetFromOptions()`
8981: @*/
8982: PetscErrorCode DMMonitor(DM dm)
8983: {
8984: PetscInt m;
8986: PetscFunctionBegin;
8987: if (!dm) PetscFunctionReturn(PETSC_SUCCESS);
8989: for (m = 0; m < dm->numbermonitors; ++m) PetscCall((*dm->monitor[m])(dm, dm->monitorcontext[m]));
8990: PetscFunctionReturn(PETSC_SUCCESS);
8991: }
8993: /*@
8994: DMComputeError - Computes the error assuming the user has provided the exact solution functions
8996: Collective
8998: Input Parameters:
8999: + dm - The `DM`
9000: - sol - The solution vector
9002: Input/Output Parameter:
9003: . errors - An array of length Nf, the number of fields, or `NULL` for no output; on output
9004: contains the error in each field
9006: Output Parameter:
9007: . errorVec - A vector to hold the cellwise error (may be `NULL`)
9009: Level: developer
9011: Note:
9012: The exact solutions come from the `PetscDS` object, and the time comes from `DMGetOutputSequenceNumber()`.
9014: .seealso: [](ch_dmbase), `DM`, `DMMonitorSet()`, `DMGetRegionNumDS()`, `PetscDSGetExactSolution()`, `DMGetOutputSequenceNumber()`
9015: @*/
9016: PetscErrorCode DMComputeError(DM dm, Vec sol, PetscReal errors[], Vec *errorVec)
9017: {
9018: PetscErrorCode (**exactSol)(PetscInt, PetscReal, const PetscReal[], PetscInt, PetscScalar[], void *);
9019: void **ctxs;
9020: PetscReal time;
9021: PetscInt Nf, f, Nds, s;
9023: PetscFunctionBegin;
9024: PetscCall(DMGetNumFields(dm, &Nf));
9025: PetscCall(PetscCalloc2(Nf, &exactSol, Nf, &ctxs));
9026: PetscCall(DMGetNumDS(dm, &Nds));
9027: for (s = 0; s < Nds; ++s) {
9028: PetscDS ds;
9029: DMLabel label;
9030: IS fieldIS;
9031: const PetscInt *fields;
9032: PetscInt dsNf;
9034: PetscCall(DMGetRegionNumDS(dm, s, &label, &fieldIS, &ds, NULL));
9035: PetscCall(PetscDSGetNumFields(ds, &dsNf));
9036: if (fieldIS) PetscCall(ISGetIndices(fieldIS, &fields));
9037: for (f = 0; f < dsNf; ++f) {
9038: const PetscInt field = fields[f];
9039: PetscCall(PetscDSGetExactSolution(ds, field, &exactSol[field], &ctxs[field]));
9040: }
9041: if (fieldIS) PetscCall(ISRestoreIndices(fieldIS, &fields));
9042: }
9043: for (f = 0; f < Nf; ++f) PetscCheck(exactSol[f], PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_WRONG, "DS must contain exact solution functions in order to calculate error, missing for field %" PetscInt_FMT, f);
9044: PetscCall(DMGetOutputSequenceNumber(dm, NULL, &time));
9045: if (errors) PetscCall(DMComputeL2FieldDiff(dm, time, exactSol, ctxs, sol, errors));
9046: if (errorVec) {
9047: DM edm;
9048: DMPolytopeType ct;
9049: PetscBool simplex;
9050: PetscInt dim, cStart, Nf;
9052: PetscCall(DMClone(dm, &edm));
9053: PetscCall(DMGetDimension(edm, &dim));
9054: PetscCall(DMPlexGetHeightStratum(dm, 0, &cStart, NULL));
9055: PetscCall(DMPlexGetCellType(dm, cStart, &ct));
9056: simplex = DMPolytopeTypeGetNumVertices(ct) == DMPolytopeTypeGetDim(ct) + 1 ? PETSC_TRUE : PETSC_FALSE;
9057: PetscCall(DMGetNumFields(dm, &Nf));
9058: for (f = 0; f < Nf; ++f) {
9059: PetscFE fe, efe;
9060: PetscQuadrature q;
9061: const char *name;
9063: PetscCall(DMGetField(dm, f, NULL, (PetscObject *)&fe));
9064: PetscCall(PetscFECreateLagrange(PETSC_COMM_SELF, dim, Nf, simplex, 0, PETSC_DETERMINE, &efe));
9065: PetscCall(PetscObjectGetName((PetscObject)fe, &name));
9066: PetscCall(PetscObjectSetName((PetscObject)efe, name));
9067: PetscCall(PetscFEGetQuadrature(fe, &q));
9068: PetscCall(PetscFESetQuadrature(efe, q));
9069: PetscCall(DMSetField(edm, f, NULL, (PetscObject)efe));
9070: PetscCall(PetscFEDestroy(&efe));
9071: }
9072: PetscCall(DMCreateDS(edm));
9074: PetscCall(DMCreateGlobalVector(edm, errorVec));
9075: PetscCall(PetscObjectSetName((PetscObject)*errorVec, "Error"));
9076: PetscCall(DMPlexComputeL2DiffVec(dm, time, exactSol, ctxs, sol, *errorVec));
9077: PetscCall(DMDestroy(&edm));
9078: }
9079: PetscCall(PetscFree2(exactSol, ctxs));
9080: PetscFunctionReturn(PETSC_SUCCESS);
9081: }
9083: /*@
9084: DMGetNumAuxiliaryVec - Get the number of auxiliary vectors associated with this `DM`
9086: Not Collective
9088: Input Parameter:
9089: . dm - The `DM`
9091: Output Parameter:
9092: . numAux - The number of auxiliary data vectors
9094: Level: advanced
9096: .seealso: [](ch_dmbase), `DM`, `DMClearAuxiliaryVec()`, `DMSetAuxiliaryVec()`, `DMGetAuxiliaryLabels()`, `DMGetAuxiliaryVec()`
9097: @*/
9098: PetscErrorCode DMGetNumAuxiliaryVec(DM dm, PetscInt *numAux)
9099: {
9100: PetscFunctionBegin;
9102: PetscCall(PetscHMapAuxGetSize(dm->auxData, numAux));
9103: PetscFunctionReturn(PETSC_SUCCESS);
9104: }
9106: /*@
9107: DMGetAuxiliaryVec - Get the auxiliary vector for region specified by the given label and value, and equation part
9109: Not Collective
9111: Input Parameters:
9112: + dm - The `DM`
9113: . label - The `DMLabel`
9114: . value - The label value indicating the region
9115: - part - The equation part, or 0 if unused
9117: Output Parameter:
9118: . aux - The `Vec` holding auxiliary field data
9120: Level: advanced
9122: Note:
9123: If no auxiliary vector is found for this (label, value), (NULL, 0, 0) is checked as well.
9125: .seealso: [](ch_dmbase), `DM`, `DMClearAuxiliaryVec()`, `DMSetAuxiliaryVec()`, `DMGetNumAuxiliaryVec()`, `DMGetAuxiliaryLabels()`
9126: @*/
9127: PetscErrorCode DMGetAuxiliaryVec(DM dm, DMLabel label, PetscInt value, PetscInt part, Vec *aux)
9128: {
9129: PetscHashAuxKey key, wild = {NULL, 0, 0};
9130: PetscBool has;
9132: PetscFunctionBegin;
9135: key.label = label;
9136: key.value = value;
9137: key.part = part;
9138: PetscCall(PetscHMapAuxHas(dm->auxData, key, &has));
9139: if (has) PetscCall(PetscHMapAuxGet(dm->auxData, key, aux));
9140: else PetscCall(PetscHMapAuxGet(dm->auxData, wild, aux));
9141: PetscFunctionReturn(PETSC_SUCCESS);
9142: }
9144: /*@
9145: DMSetAuxiliaryVec - Set an auxiliary vector for region specified by the given label and value, and equation part
9147: Not Collective because auxiliary vectors are not parallel
9149: Input Parameters:
9150: + dm - The `DM`
9151: . label - The `DMLabel`
9152: . value - The label value indicating the region
9153: . part - The equation part, or 0 if unused
9154: - aux - The `Vec` holding auxiliary field data
9156: Level: advanced
9158: .seealso: [](ch_dmbase), `DM`, `DMClearAuxiliaryVec()`, `DMGetAuxiliaryVec()`, `DMGetAuxiliaryLabels()`, `DMCopyAuxiliaryVec()`
9159: @*/
9160: PetscErrorCode DMSetAuxiliaryVec(DM dm, DMLabel label, PetscInt value, PetscInt part, Vec aux)
9161: {
9162: Vec old;
9163: PetscHashAuxKey key;
9165: PetscFunctionBegin;
9168: key.label = label;
9169: key.value = value;
9170: key.part = part;
9171: PetscCall(PetscHMapAuxGet(dm->auxData, key, &old));
9172: PetscCall(PetscObjectReference((PetscObject)aux));
9173: if (!aux) PetscCall(PetscHMapAuxDel(dm->auxData, key));
9174: else PetscCall(PetscHMapAuxSet(dm->auxData, key, aux));
9175: PetscCall(VecDestroy(&old));
9176: PetscFunctionReturn(PETSC_SUCCESS);
9177: }
9179: /*@
9180: DMGetAuxiliaryLabels - Get the labels, values, and parts for all auxiliary vectors in this `DM`
9182: Not Collective
9184: Input Parameter:
9185: . dm - The `DM`
9187: Output Parameters:
9188: + labels - The `DMLabel`s for each `Vec`
9189: . values - The label values for each `Vec`
9190: - parts - The equation parts for each `Vec`
9192: Level: advanced
9194: Note:
9195: The arrays passed in must be at least as large as `DMGetNumAuxiliaryVec()`.
9197: .seealso: [](ch_dmbase), `DM`, `DMClearAuxiliaryVec()`, `DMGetNumAuxiliaryVec()`, `DMGetAuxiliaryVec()`, `DMSetAuxiliaryVec()`, `DMCopyAuxiliaryVec()`
9198: @*/
9199: PetscErrorCode DMGetAuxiliaryLabels(DM dm, DMLabel labels[], PetscInt values[], PetscInt parts[])
9200: {
9201: PetscHashAuxKey *keys;
9202: PetscInt n, i, off = 0;
9204: PetscFunctionBegin;
9206: PetscAssertPointer(labels, 2);
9207: PetscAssertPointer(values, 3);
9208: PetscAssertPointer(parts, 4);
9209: PetscCall(DMGetNumAuxiliaryVec(dm, &n));
9210: PetscCall(PetscMalloc1(n, &keys));
9211: PetscCall(PetscHMapAuxGetKeys(dm->auxData, &off, keys));
9212: for (i = 0; i < n; ++i) {
9213: labels[i] = keys[i].label;
9214: values[i] = keys[i].value;
9215: parts[i] = keys[i].part;
9216: }
9217: PetscCall(PetscFree(keys));
9218: PetscFunctionReturn(PETSC_SUCCESS);
9219: }
9221: /*@
9222: DMCopyAuxiliaryVec - Copy the auxiliary vector data on a `DM` to a new `DM`
9224: Not Collective
9226: Input Parameter:
9227: . dm - The `DM`
9229: Output Parameter:
9230: . dmNew - The new `DM`, now with the same auxiliary data
9232: Level: advanced
9234: Note:
9235: This is a shallow copy of the auxiliary vectors
9237: .seealso: [](ch_dmbase), `DM`, `DMClearAuxiliaryVec()`, `DMGetNumAuxiliaryVec()`, `DMGetAuxiliaryVec()`, `DMSetAuxiliaryVec()`
9238: @*/
9239: PetscErrorCode DMCopyAuxiliaryVec(DM dm, DM dmNew)
9240: {
9241: PetscFunctionBegin;
9244: if (dm == dmNew) PetscFunctionReturn(PETSC_SUCCESS);
9245: PetscCall(DMClearAuxiliaryVec(dmNew));
9247: PetscCall(PetscHMapAuxDestroy(&dmNew->auxData));
9248: PetscCall(PetscHMapAuxDuplicate(dm->auxData, &dmNew->auxData));
9249: {
9250: Vec *auxData;
9251: PetscInt n, i, off = 0;
9253: PetscCall(PetscHMapAuxGetSize(dmNew->auxData, &n));
9254: PetscCall(PetscMalloc1(n, &auxData));
9255: PetscCall(PetscHMapAuxGetVals(dmNew->auxData, &off, auxData));
9256: for (i = 0; i < n; ++i) PetscCall(PetscObjectReference((PetscObject)auxData[i]));
9257: PetscCall(PetscFree(auxData));
9258: }
9259: PetscFunctionReturn(PETSC_SUCCESS);
9260: }
9262: /*@
9263: DMClearAuxiliaryVec - Destroys the auxiliary vector information and creates a new empty one
9265: Not Collective
9267: Input Parameter:
9268: . dm - The `DM`
9270: Level: advanced
9272: .seealso: [](ch_dmbase), `DM`, `DMCopyAuxiliaryVec()`, `DMGetNumAuxiliaryVec()`, `DMGetAuxiliaryVec()`, `DMSetAuxiliaryVec()`
9273: @*/
9274: PetscErrorCode DMClearAuxiliaryVec(DM dm)
9275: {
9276: Vec *auxData;
9277: PetscInt n, i, off = 0;
9279: PetscFunctionBegin;
9280: PetscCall(PetscHMapAuxGetSize(dm->auxData, &n));
9281: PetscCall(PetscMalloc1(n, &auxData));
9282: PetscCall(PetscHMapAuxGetVals(dm->auxData, &off, auxData));
9283: for (i = 0; i < n; ++i) PetscCall(VecDestroy(&auxData[i]));
9284: PetscCall(PetscFree(auxData));
9285: PetscCall(PetscHMapAuxDestroy(&dm->auxData));
9286: PetscCall(PetscHMapAuxCreate(&dm->auxData));
9287: PetscFunctionReturn(PETSC_SUCCESS);
9288: }
9290: /*@
9291: DMPolytopeMatchOrientation - Determine an orientation (transformation) that takes the source face arrangement to the target face arrangement
9293: Not Collective
9295: Input Parameters:
9296: + ct - The `DMPolytopeType`
9297: . sourceCone - The source arrangement of faces
9298: - targetCone - The target arrangement of faces
9300: Output Parameters:
9301: + ornt - The orientation (transformation) which will take the source arrangement to the target arrangement
9302: - found - Flag indicating that a suitable orientation was found
9304: Level: advanced
9306: Note:
9307: An arrangement is a face order combined with an orientation for each face
9309: Each orientation (transformation) is labeled with an integer from negative `DMPolytopeTypeGetNumArrangements(ct)`/2 to `DMPolytopeTypeGetNumArrangements(ct)`/2
9310: that labels each arrangement (face ordering plus orientation for each face).
9312: See `DMPolytopeMatchVertexOrientation()` to find a new vertex orientation that takes the source vertex arrangement to the target vertex arrangement
9314: .seealso: [](ch_dmbase), `DM`, `DMPolytopeGetOrientation()`, `DMPolytopeMatchVertexOrientation()`, `DMPolytopeGetVertexOrientation()`
9315: @*/
9316: PetscErrorCode DMPolytopeMatchOrientation(DMPolytopeType ct, const PetscInt sourceCone[], const PetscInt targetCone[], PetscInt *ornt, PetscBool *found)
9317: {
9318: const PetscInt cS = DMPolytopeTypeGetConeSize(ct);
9319: const PetscInt nO = DMPolytopeTypeGetNumArrangements(ct) / 2;
9320: PetscInt o, c;
9322: PetscFunctionBegin;
9323: if (!nO) {
9324: *ornt = 0;
9325: *found = PETSC_TRUE;
9326: PetscFunctionReturn(PETSC_SUCCESS);
9327: }
9328: for (o = -nO; o < nO; ++o) {
9329: const PetscInt *arr = DMPolytopeTypeGetArrangement(ct, o);
9331: for (c = 0; c < cS; ++c)
9332: if (sourceCone[arr[c * 2]] != targetCone[c]) break;
9333: if (c == cS) {
9334: *ornt = o;
9335: break;
9336: }
9337: }
9338: *found = o == nO ? PETSC_FALSE : PETSC_TRUE;
9339: PetscFunctionReturn(PETSC_SUCCESS);
9340: }
9342: /*@
9343: DMPolytopeGetOrientation - Determine an orientation (transformation) that takes the source face arrangement to the target face arrangement
9345: Not Collective
9347: Input Parameters:
9348: + ct - The `DMPolytopeType`
9349: . sourceCone - The source arrangement of faces
9350: - targetCone - The target arrangement of faces
9352: Output Parameter:
9353: . ornt - The orientation (transformation) which will take the source arrangement to the target arrangement
9355: Level: advanced
9357: Note:
9358: This function is the same as `DMPolytopeMatchOrientation()` except it will generate an error if no suitable orientation can be found.
9360: Developer Note:
9361: It is unclear why this function needs to exist since one can simply call `DMPolytopeMatchOrientation()` and error if none is found
9363: .seealso: [](ch_dmbase), `DM`, `DMPolytopeType`, `DMPolytopeMatchOrientation()`, `DMPolytopeGetVertexOrientation()`, `DMPolytopeMatchVertexOrientation()`
9364: @*/
9365: PetscErrorCode DMPolytopeGetOrientation(DMPolytopeType ct, const PetscInt sourceCone[], const PetscInt targetCone[], PetscInt *ornt)
9366: {
9367: PetscBool found;
9369: PetscFunctionBegin;
9370: PetscCall(DMPolytopeMatchOrientation(ct, sourceCone, targetCone, ornt, &found));
9371: PetscCheck(found, PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Could not find orientation for %s", DMPolytopeTypes[ct]);
9372: PetscFunctionReturn(PETSC_SUCCESS);
9373: }
9375: /*@
9376: DMPolytopeMatchVertexOrientation - Determine an orientation (transformation) that takes the source vertex arrangement to the target vertex arrangement
9378: Not Collective
9380: Input Parameters:
9381: + ct - The `DMPolytopeType`
9382: . sourceVert - The source arrangement of vertices
9383: - targetVert - The target arrangement of vertices
9385: Output Parameters:
9386: + ornt - The orientation (transformation) which will take the source arrangement to the target arrangement
9387: - found - Flag indicating that a suitable orientation was found
9389: Level: advanced
9391: Notes:
9392: An arrangement is a vertex order
9394: Each orientation (transformation) is labeled with an integer from negative `DMPolytopeTypeGetNumArrangements(ct)`/2 to `DMPolytopeTypeGetNumArrangements(ct)`/2
9395: that labels each arrangement (vertex ordering).
9397: See `DMPolytopeMatchOrientation()` to find a new face orientation that takes the source face arrangement to the target face arrangement
9399: .seealso: [](ch_dmbase), `DM`, `DMPolytopeType`, `DMPolytopeGetOrientation()`, `DMPolytopeMatchOrientation()`, `DMPolytopeTypeGetNumVertices()`, `DMPolytopeTypeGetVertexArrangement()`
9400: @*/
9401: PetscErrorCode DMPolytopeMatchVertexOrientation(DMPolytopeType ct, const PetscInt sourceVert[], const PetscInt targetVert[], PetscInt *ornt, PetscBool *found)
9402: {
9403: const PetscInt cS = DMPolytopeTypeGetNumVertices(ct);
9404: const PetscInt nO = DMPolytopeTypeGetNumArrangements(ct) / 2;
9405: PetscInt o, c;
9407: PetscFunctionBegin;
9408: if (!nO) {
9409: *ornt = 0;
9410: *found = PETSC_TRUE;
9411: PetscFunctionReturn(PETSC_SUCCESS);
9412: }
9413: for (o = -nO; o < nO; ++o) {
9414: const PetscInt *arr = DMPolytopeTypeGetVertexArrangement(ct, o);
9416: for (c = 0; c < cS; ++c)
9417: if (sourceVert[arr[c]] != targetVert[c]) break;
9418: if (c == cS) {
9419: *ornt = o;
9420: break;
9421: }
9422: }
9423: *found = o == nO ? PETSC_FALSE : PETSC_TRUE;
9424: PetscFunctionReturn(PETSC_SUCCESS);
9425: }
9427: /*@
9428: DMPolytopeGetVertexOrientation - Determine an orientation (transformation) that takes the source vertex arrangement to the target vertex arrangement
9430: Not Collective
9432: Input Parameters:
9433: + ct - The `DMPolytopeType`
9434: . sourceCone - The source arrangement of vertices
9435: - targetCone - The target arrangement of vertices
9437: Output Parameter:
9438: . ornt - The orientation (transformation) which will take the source arrangement to the target arrangement
9440: Level: advanced
9442: Note:
9443: This function is the same as `DMPolytopeMatchVertexOrientation()` except it errors if not orientation is possible.
9445: Developer Note:
9446: It is unclear why this function needs to exist since one can simply call `DMPolytopeMatchVertexOrientation()` and error if none is found
9448: .seealso: [](ch_dmbase), `DM`, `DMPolytopeType`, `DMPolytopeMatchVertexOrientation()`, `DMPolytopeGetOrientation()`
9449: @*/
9450: PetscErrorCode DMPolytopeGetVertexOrientation(DMPolytopeType ct, const PetscInt sourceCone[], const PetscInt targetCone[], PetscInt *ornt)
9451: {
9452: PetscBool found;
9454: PetscFunctionBegin;
9455: PetscCall(DMPolytopeMatchVertexOrientation(ct, sourceCone, targetCone, ornt, &found));
9456: PetscCheck(found, PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Could not find orientation for %s", DMPolytopeTypes[ct]);
9457: PetscFunctionReturn(PETSC_SUCCESS);
9458: }
9460: /*@
9461: DMPolytopeInCellTest - Check whether a point lies inside the reference cell of given type
9463: Not Collective
9465: Input Parameters:
9466: + ct - The `DMPolytopeType`
9467: - point - Coordinates of the point
9469: Output Parameter:
9470: . inside - Flag indicating whether the point is inside the reference cell of given type
9472: Level: advanced
9474: .seealso: [](ch_dmbase), `DM`, `DMPolytopeType`, `DMLocatePoints()`
9475: @*/
9476: PetscErrorCode DMPolytopeInCellTest(DMPolytopeType ct, const PetscReal point[], PetscBool *inside)
9477: {
9478: PetscReal sum = 0.0;
9479: PetscInt d;
9481: PetscFunctionBegin;
9482: *inside = PETSC_TRUE;
9483: switch (ct) {
9484: case DM_POLYTOPE_TRIANGLE:
9485: case DM_POLYTOPE_TETRAHEDRON:
9486: for (d = 0; d < DMPolytopeTypeGetDim(ct); ++d) {
9487: if (point[d] < -1.0) {
9488: *inside = PETSC_FALSE;
9489: break;
9490: }
9491: sum += point[d];
9492: }
9493: if (sum > PETSC_SMALL) {
9494: *inside = PETSC_FALSE;
9495: break;
9496: }
9497: break;
9498: case DM_POLYTOPE_QUADRILATERAL:
9499: case DM_POLYTOPE_HEXAHEDRON:
9500: for (d = 0; d < DMPolytopeTypeGetDim(ct); ++d)
9501: if (PetscAbsReal(point[d]) > 1. + PETSC_SMALL) {
9502: *inside = PETSC_FALSE;
9503: break;
9504: }
9505: break;
9506: default:
9507: SETERRQ(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Unsupported polytope type %s", DMPolytopeTypes[ct]);
9508: }
9509: PetscFunctionReturn(PETSC_SUCCESS);
9510: }
9512: /*@
9513: DMReorderSectionSetDefault - Set flag indicating whether the local section should be reordered by default
9515: Logically collective
9517: Input Parameters:
9518: + dm - The DM
9519: - reorder - Flag for reordering
9521: Level: intermediate
9523: .seealso: `DMReorderSectionGetDefault()`
9524: @*/
9525: PetscErrorCode DMReorderSectionSetDefault(DM dm, DMReorderDefaultFlag reorder)
9526: {
9527: PetscFunctionBegin;
9529: PetscTryMethod(dm, "DMReorderSectionSetDefault_C", (DM, DMReorderDefaultFlag), (dm, reorder));
9530: PetscFunctionReturn(PETSC_SUCCESS);
9531: }
9533: /*@
9534: DMReorderSectionGetDefault - Get flag indicating whether the local section should be reordered by default
9536: Not collective
9538: Input Parameter:
9539: . dm - The DM
9541: Output Parameter:
9542: . reorder - Flag for reordering
9544: Level: intermediate
9546: .seealso: `DMReorderSetDefault()`
9547: @*/
9548: PetscErrorCode DMReorderSectionGetDefault(DM dm, DMReorderDefaultFlag *reorder)
9549: {
9550: PetscFunctionBegin;
9552: PetscAssertPointer(reorder, 2);
9553: *reorder = DM_REORDER_DEFAULT_NOTSET;
9554: PetscTryMethod(dm, "DMReorderSectionGetDefault_C", (DM, DMReorderDefaultFlag *), (dm, reorder));
9555: PetscFunctionReturn(PETSC_SUCCESS);
9556: }
9558: /*@
9559: DMReorderSectionSetType - Set the type of local section reordering
9561: Logically collective
9563: Input Parameters:
9564: + dm - The DM
9565: - reorder - The reordering method
9567: Level: intermediate
9569: .seealso: `DMReorderSectionGetType()`, `DMReorderSectionSetDefault()`
9570: @*/
9571: PetscErrorCode DMReorderSectionSetType(DM dm, MatOrderingType reorder)
9572: {
9573: PetscFunctionBegin;
9575: PetscTryMethod(dm, "DMReorderSectionSetType_C", (DM, MatOrderingType), (dm, reorder));
9576: PetscFunctionReturn(PETSC_SUCCESS);
9577: }
9579: /*@
9580: DMReorderSectionGetType - Get the reordering type for the local section
9582: Not collective
9584: Input Parameter:
9585: . dm - The DM
9587: Output Parameter:
9588: . reorder - The reordering method
9590: Level: intermediate
9592: .seealso: `DMReorderSetDefault()`, `DMReorderSectionGetDefault()`
9593: @*/
9594: PetscErrorCode DMReorderSectionGetType(DM dm, MatOrderingType *reorder)
9595: {
9596: PetscFunctionBegin;
9598: PetscAssertPointer(reorder, 2);
9599: *reorder = NULL;
9600: PetscTryMethod(dm, "DMReorderSectionGetType_C", (DM, MatOrderingType *), (dm, reorder));
9601: PetscFunctionReturn(PETSC_SUCCESS);
9602: }